memfd_luo_retrieve_folios() initialises err to -EIO, but the per-iteration
calls to mem_cgroup_charge(), shmem_add_to_page_cache() and
shmem_inode_acct_blocks() reuse and overwrite err. Once any iteration
completes successfully, err becomes zero.
If a later iteration's kho_restore_folio() returns NULL, the failure path
jumps to put_folios without resetting err, so the function returns 0.
The caller memfd_luo_retrieve() then takes the success path, sets
args->file and reports the restore as successful, leaving userspace with
a partially populated memfd and no indication that anything went wrong.
Set err to -EIO in the kho_restore_folio() failure branch so the error
is propagated to the caller.
Signed-off-by: David Carlier <devnexen@gmail.com>
Reviewed-by: Pratyush Yadav <pratyush@kernel.org>
Fixes: b3749f174d ("mm: memfd_luo: allow preserving memfd")
Link: https://patch.msgid.link/20260415052300.362539-1-devnexen@gmail.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
The buffer parameters in populate_{security,string}_buffer() and
call_{biosattributes,password}_interface() are raw byte buffers, not
character strings - use 'u8 *' instead of 'char *' to reflect this.
Update the local buffer variables at the call sites and in
populate_security_buffer() accordingly.
Suggested-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260410091633.2822-4-thorsten.blum@linux.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
kho_fill_kimage() unconditionally populates the kimage with KHO
metadata for every kexec image type. When the image is a crash kernel,
this can be problematic as the crash kernel can run in a small reserved
region and the KHO scratch areas can sit outside it.
The crash kernel then faults during kho_memory_init() when it
tries phys_to_virt() on the KHO FDT address:
Unable to handle kernel paging request at virtual address xxxxxxxx
...
fdt_offset_ptr+...
fdt_check_node_offset_+...
fdt_first_property_offset+...
fdt_get_property_namelen_+...
fdt_getprop+...
kho_memory_init+...
mm_core_init+...
start_kernel+...
kho_locate_mem_hole() already skips KHO logic for KEXEC_TYPE_CRASH
images, but kho_fill_kimage() was missing the same guard. As
kho_fill_kimage() is the single point that populates image->kho.fdt
and image->kho.scratch, fixing it here is sufficient for both arm64
and x86 as the FDT and boot_params path are bailing out when these
fields are unset.
Fixes: d7255959b6 ("kho: allow kexec load before KHO finalization")
Signed-off-by: Evangelos Petrongonas <epetron@amazon.de>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260410011609.1103-1-epetron@amazon.de
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
The Smatch reported a warning in __ntfs_bitmap_set_bits_in_run():
"warn: passing a valid pointer to 'PTR_ERR'"
This occurs because the 'folio' variable might contain a valid pointer
when jumping to the 'rollback' label, specifically when 'cnt <= 0' is
detected during the subsequent page mapping loop. In such cases,
calling PTR_ERR(folio) is incorrect as it does not contain an error
code.
Fix this by introducing an explicit 'err' variable to track the error
status. This ensures that the rollback logic and the return value
consistently use a proper error code regardless of the state of the
folio pointer.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
In case of a Secure-Storage-Access exception the effective aka virtual
address which caused the exception is contained within the TEID.
do_secure_storage_access() incorrectly uses phys_to_folio() instead of
virt_to_folio() to translate the virtual address to the corresponding
folio.
Fix this by using virt_to_folio() instead of phys_to_folio().
Fixes: 084ea4d611 ("s390/mm: add (non)secure page access exceptions handlers")
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Remove the SCLP_OFB Kconfig option and enable the guarded code
unconditionally. This guards only a few lines of code, so the impact is
very low while at the same time this reduces the large number of Kconfig
options.
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Add myself as co-maintainer for s390/pci, replacing Gerald Schaefer who
has moved his focus to s390/mm. Thank you Gerald!
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Acked-by: Niklas Schnelle <schnelle@linux.ibm.com>
Acked-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
debug_input_flush_fn() always copies one byte from the userspace buffer
with copy_from_user() regardless of the supplied write length. A
zero-length write therefore reads one byte beyond the caller's buffer.
If the stale byte happens to be '-' or a digit the debug log is
silently flushed. With an unmapped buffer the call returns -EFAULT.
Reject zero-length writes before copying from userspace.
Cc: stable@vger.kernel.org # v5.10+
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
debug_get_user_string() duplicates the userspace buffer with
memdup_user_nul() and then unconditionally looks at buffer[user_len - 1]
to strip a trailing newline.
A zero-length write reaches this helper unchanged, so the newline trim
reads before the start of the allocated buffer.
Reject empty writes before accessing the last input byte.
Fixes: 66a464dbc8 ("[PATCH] s390: debug feature changes")
Cc: stable@vger.kernel.org
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Tested-by: Vasily Gorbik <gor@linux.ibm.com>
Link: https://lore.kernel.org/r/20260417073530.96002-1-pengpeng@iscas.ac.cn
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Add a real none bitmap backend that exposes the common bitmap sysfs
group and use it to keep bitmap/location available when an array has no
bitmap.
Then switch the bitmap location sysfs path to move only between none
and the classic bitmap backend, using the no-sysfs bitmap helpers while
merging or unmerging the internal bitmap sysfs group.
This restores mdadm --grow bitmap addition through bitmap/location.
Fixes: fb8cc3b0d9 ("md/md-bitmap: delay registration of bitmap_ops until creating bitmap")
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-4-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Split the classic bitmap sysfs files into a common bitmap group with
the location attribute and a separate internal bitmap group for the
remaining files.
At the same time, convert bitmap operations from a single sysfs group
to a sysfs group array so backends can share part of their sysfs
layout while adding backend-specific attributes separately.
Switch the bitmap sysfs helpers to use sysfs_update_groups() for the
add and update path, and remove groups in reverse order so shared named
groups are unmerged before the last group removes the directory.
Also make bitmap operation lookup depend only on the currently selected
bitmap id matching the installed backend. This prepares the lookup path
for a later registered none backend.
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-3-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Factor bitmap creation and destruction into helpers that do not touch
bitmap sysfs registration.
This prepares the bitmap sysfs rework so callers such as the sysfs
bitmap location path can create or destroy a bitmap backend without
coupling that to sysfs group lifetime management.
Reviewed-by: Su Yue <glass.su@suse.com>
Link: https://lore.kernel.org/r/20260425024615.1696892-2-yukuai@fnnas.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
This keeps mddev locking consistent and ensures that any future changes
to locking behavior are done through the wrapper.
Signed-off-by: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
Link: https://lore.kernel.org/r/20260415140319.376578-3-abd.masalkhi@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
setup_geo() extracts near_copies (nc) and far_copies (fc) from the
user-provided layout parameter without checking for zero. When fc=0
with the "improved" far set layout selected, 'geo->far_set_size =
disks / fc' triggers a divide-by-zero.
Validate nc and fc immediately after extraction, returning -1 if
either is zero.
Fixes: 475901aff1 ("MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)")
Cc: stable@vger.kernel.org
Signed-off-by: Junrui Luo <moonafterrain@outlook.com>
Link: https://lore.kernel.org/linux-raid/SYBPR01MB7881A5E2556806CC1D318582AF232@SYBPR01MB7881.ausprd01.prod.outlook.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
BLK_STS_INVAL indicates the IO request itself was invalid, not that the
device has failed. When raid1 treats this as a device error, it retries
on alternate mirrors which fail the same way, eventually exceeding the
read error threshold and removing the device from the array.
This happens when stacking configurations bypass bio_split_to_limits()
in the IO path: dm-raid calls md_handle_request() directly without going
through md_submit_bio(), skipping the alignment validation that would
otherwise reject invalid bios early. The invalid bio reaches the
lower block layers, which fail the bio with BLK_STS_INVAL, and raid1
wrongly interprets this as a device failure.
Add BLK_STS_INVAL to raid1_should_handle_error() so that invalid IO
errors are propagated back to the caller rather than triggering device
removal. This is consistent with the previous kernel behavior when
alignment checks were done earlier in the direct-io path.
Fixes: 5ff3f74e14 ("block: simplify direct io validity check")
Reported-by: Tomáš Trnka <trnka@scm.com>
Closes: https://lore.kernel.org/linux-block/2982107.4sosBPzcNG@electra/
Signed-off-by: Keith Busch <kbusch@kernel.org>
Tested-by: Tomáš Trnka <trnka@scm.com>
Link: https://lore.kernel.org/r/20260416140345.3872265-1-kbusch@meta.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
I've been actively involved in the md subsystem, contributing bug
fixes, performance improvements, and participating in code reviews.
I will help improve patch review coverage and response time.
Signed-off-by: Xiao Ni <xiao@kernel.org>
Link: https://lore.kernel.org/r/20260414022956.48271-1-xiaoraid25@gmail.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
If make_stripe_request() returns STRIPE_WAIT_RESHAPE,
raid5_make_request() will free the cloned bio. But raid5_make_request()
can call make_stripe_request() multiple times, writing to the various
stripes. If that bio got added to the toread or towrite lists of a
stripe disk in an earlier call to make_stripe_request(), then it's not
safe to just free the bio if a later part of it is found to cross the
reshape position. Doing so can lead to a UAF error, when bio_endio()
is called on the bio for the earlier stripes.
Instead, raid5_make_request() needs to wait until all parts of the bio
have called bio_endio(). To do this, bios that cross the reshape
position while the reshape can't make progress are flagged as needing to
wait for all parts to complete. When raid5_make_request() has a bio that
failed make_stripe_request() with STRIPE_WAIT_RESHAPE, it sets
bi->bi_private to a completion struct and waits for completion after
ending the bio. When the bio_endio() is called for the last time on a
clone bio with bi->bi_private set, it wakes up the waiter. This
guarantees that raid5_make_request() doesn't return until the cloned bio
needing a retry for io across the reshape boundary is safely cleaned up.
There is a simple reproducer available at [1]. Compile the kernel with
KASAN for more useful reporting when the error is triggered (this is not
necessary to see the bug).
[1] https://gist.github.com/bmarzins/e48598824305cf2171289e47d7241fa5
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Link: https://lore.kernel.org/r/20260408043548.1695157-1-bmarzins@redhat.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Fix the horizontal bit position when rotating a glyph by 180°. The
original code in rotate_ud() rounded the value in width up to a
multiple of 8, aka the bit pitch, and calculated the rotated pixel
from that value. The new code stores the glyph's pitch in bit_pitch,
but fails to update the rotated pixel's output accordingly. Simply
replacing the variable does this.
The bug can be reproduced by setting a font with an unaligned width,
such as sun12x22, like this:
setfont sun12x22
echo 2 > /sys/class/graphics/fbcon/rotate
Without the fix, the font looks distorted.
Fixes: a30e9e6b01 ("lib/fonts: Refactor glyph-rotation helpers")
Closes: https://lore.gitlab.freedesktop.org/drm-ai-reviews/review-patch7-20260407092555.58816-8-tzimmermann@suse.de/
Cc: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Remove duplicate inclusion of linux/module.h in fb_defio.c to clean up
redundant code.
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Helge Deller <deller@gmx.de>
Correct all kernel-doc warnings:
- fix a typedef kernel-doc comment
- mark a list_head as private
- use Returns: for function return values
Warning: include/video/imx-ipu-image-convert.h:31 struct member 'list' not
described in 'ipu_image_convert_run'
Warning: include/video/imx-ipu-image-convert.h:40 function parameter
'ipu_image_convert_cb_t' not described in 'void'
Warning: include/video/imx-ipu-image-convert.h:40 expecting prototype for
ipu_image_convert_cb_t(). Prototype was for void() instead
Warning: include/video/imx-ipu-image-convert.h:66 No description found for
return value of 'ipu_image_convert_verify'
Warning: include/video/imx-ipu-image-convert.h:90 No description found for
return value of 'ipu_image_convert_prepare'
Warning: include/video/imx-ipu-image-convert.h:125 No description found for
return value of 'ipu_image_convert_queue'
Warning: include/video/imx-ipu-image-convert.h:163 No description found for
return value of 'ipu_image_convert'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Helge Deller <deller@gmx.de>
Currently, mctp_i2c_get_tx_flow_state() is called before the packet length
sanity check. This function marks a new flow as active in the MCTP core.
If the sanity check fails, mctp_i2c_xmit() returns early without calling
mctp_i2c_lock_nest(). This results in a mismatched locking state: the
flow is active, but the I2C bus lock was never acquired for it.
When the flow is later released, mctp_i2c_release_flow() will see the
active state and queue an unlock marker. The TX thread will then
decrement midev->i2c_lock_count from 0, causing it to underflow to -1.
This underflow permanently breaks the driver's locking logic, allowing
future transmissions to occur without holding the I2C bus lock, leading
to bus collisions and potential hardware hangs.
Move the mctp_i2c_get_tx_flow_state() call to after the length sanity
check to ensure we only transition the flow state if we are actually
going to proceed with the transmission and locking.
Fixes: f5b8abf9fc ("mctp i2c: MCTP I2C binding driver")
Signed-off-by: William A. Kennington III <william@wkennington.com>
Acked-by: Jeremy Kerr <jk@codeconstruct.com.au>
Link: https://patch.msgid.link/20260423074741.201460-1-william@wkennington.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reuse the same assembly as SVM, just with alternatives instead
of cpu_feature_enabled(X86_FEATURE_KERNEL_IBRS).
Note that Intel does need an LFENCE with eIBRS, unlike AMD's AutoIBRS.
However, it is not needed for X86_FEATURE_KERNEL_IBRS because there
are no conditional branches between FILL_RETURN_BUFFER and ret.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rename VMX_RUN_* to KVM_ENTER_* (to not confuse with KVM_RUN_* that
already exists) and replace SVM's spec_ctrl_intercepted with that same
bitmask.
Note that KVM_ENTER_SAVE_SPEC_CTRL has the opposite polarity compared
to spec_ctrl_intercepted. That is, the guest value of the MSR must be
saved if it writes are *not* intercepted.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Remove the local labels and restrict RESTORE_*_BODY to just
the restore code itself. Since the alternatives are different
between VMX and SVM, having labels in the per-vendor file and
jumps in another would be too confusing.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Slightly improve register allocation, loading vmx only once
before vmlaunch/vmresume.
This also makes the code slightly more similar to the one for
AMD processors, in that both keep the pointer to struct vcpu_vmx
or vcpu_svm in %rdi. The code for restoring the guest value of
SPEC_CTRL is also the same for Intel and AMD.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Registers are reachable through vcpu_vmx, no need to pass
a separate pointer to the regs[] array.
No functional change intended.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add a helper that determines whether AS SDP can be used for the
current DP configuration. For now this is true only when the sink
supports AS SDP and VRR is enabled, but more conditions may be added
later.
v2:
- Rename to intel_dp_needs_as_sdp(). (Ville)
- Add a #FIXME documenting non-atomic of DP SDP updates. (Ville)
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260424090942.3060291-3-ankit.k.nautiyal@intel.com
Currently we do not support VRR with HDMI so skip vrr compute
config step for all DP branch devices.
v2: Restrict VRR on all DP branch devices instead for checking only for
HDMI. (Ville)
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20260424090942.3060291-2-ankit.k.nautiyal@intel.com
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistentcy cannot be addressed without refactoring the API.
alloc_workqueue() treats all queues as per-CPU by default, while unbound
workqueues must opt-in via WQ_UNBOUND.
This default is suboptimal: most workloads benefit from unbound queues,
allowing the scheduler to place worker threads where they’re needed and
reducing noise when CPUs are isolated.
This change adds a new WQ_PERCPU flag to explicitly request
alloc_workqueue() to be per-cpu when WQ_UNBOUND has not been specified.
With the introduction of the WQ_PERCPU flag (equivalent to !WQ_UNBOUND),
any alloc_workqueue() caller that doesn’t explicitly specify WQ_UNBOUND
must now use WQ_PERCPU.
Once migration is complete, WQ_UNBOUND can be removed and unbound will
become the implicit default.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Link: https://patch.msgid.link/20251031102020.95349-3-marco.crivellari@suse.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Currently if a user enqueue a work item using schedule_delayed_work() the
used wq is "system_wq" (per-cpu wq) while queue_delayed_work() use
WORK_CPU_UNBOUND (used when a cpu is not specified). The same applies to
schedule_work() that is using system_wq and queue_work(), that makes use
again of WORK_CPU_UNBOUND.
This lack of consistency cannot be addressed without refactoring the API.
system_unbound_wq should be the default workqueue so as not to enforce
locality constraints for random work whenever it's not required.
Adding system_dfl_wq to encourage its use when unbound work should be used.
The old system_unbound_wq will be kept for a few release cycles.
Suggested-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Marco Crivellari <marco.crivellari@suse.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patch.msgid.link/20251031102020.95349-2-marco.crivellari@suse.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
Instead of an extra kcalloc, Use a flexible array member to combine
allocations. Saves a pointer in the struct.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Acked-by: Hal Feng <hal.feng@starfivetech.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
If kzalloc fails, the function returns -ENOMEM without calling
efivar_unlock(). Since open() returned an error, the calling site
in pstore_get_backend_records() won't call the close() function, so
the lock is never released. Thus drop the lock in case of errors here.
Fixes: 859748255b ("efi: pstore: Omit efivars caching EFI varstore access layer")
Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Use QSTR() and drop strlen() in efivarfs_alloc_dentry().
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
The CPU receives frames from the MAC through conventional DMA: the CPU
allocates buffers for the MAC, then the MAC fills them and returns
ownership to the CPU. For each hardware RX queue, the CPU and MAC
coordinate through a shared ring array of DMA descriptors: one
descriptor per DMA buffer. Each descriptor includes the buffer's
physical address and a status flag ("OWN") indicating which side owns
the buffer: OWN=0 for CPU, OWN=1 for MAC. The CPU is only allowed to set
the flag and the MAC is only allowed to clear it, and both must move
through the ring in sequence: thus the ring is used for both
"submissions" and "completions."
In the stmmac driver, stmmac_rx() bookmarks its position in the ring
with the `cur_rx` index. The main receive loop in that function checks
for rx_descs[cur_rx].own=0, gives the corresponding buffer to the
network stack (NULLing the pointer), and increments `cur_rx` modulo the
ring size. After the loop exits, stmmac_rx_refill(), which bookmarks its
position with `dirty_rx`, allocates fresh buffers and rearms the
descriptors (setting OWN=1). If it fails any allocation, it simply stops
early (leaving OWN=0) and will retry where it left off when next called.
This means descriptors have a three-stage lifecycle (terms my own):
- `empty` (OWN=1, buffer valid)
- `full` (OWN=0, buffer valid and populated)
- `dirty` (OWN=0, buffer NULL)
But because stmmac_rx() only checks OWN, it confuses `full`/`dirty`. In
the past (see 'Fixes:'), there was a bug where the loop could cycle
`cur_rx` all the way back to the first descriptor it dirtied, resulting
in a NULL dereference when mistaken for `full`. The aforementioned
commit resolved that *specific* failure by capping the loop's iteration
limit at `dma_rx_size - 1`, but this is only a partial fix: if the
previous stmmac_rx_refill() didn't complete, then there are leftover
`dirty` descriptors that the loop might encounter without needing to
cycle fully around. The current code therefore panics (see 'Closes:')
when stmmac_rx_refill() is memory-starved long enough for `cur_rx` to
catch up to `dirty_rx`.
Fix this by explicitly checking, before advancing `cur_rx`, if the next
entry is dirty; exit the loop if so. This prevents processing of the
final, used descriptor until stmmac_rx_refill() succeeds, but
fully prevents the `cur_rx == dirty_rx` ambiguity as the previous bugfix
intended: so remove the clamp as well. Since stmmac_rx_zc() is a
copy-paste-and-tweak of stmmac_rx() and the code structure is identical,
any fix to stmmac_rx() will also need a corresponding fix for
stmmac_rx_zc(). Therefore, apply the same check there.
In stmmac_rx() (not stmmac_rx_zc()), a related bug remains: after the
MAC sets OWN=0 on the final descriptor, it will be unable to send any
further DMA-complete IRQs until it's given more `empty` descriptors.
Currently, the driver simply *hopes* that the next stmmac_rx_refill()
succeeds, risking an indefinite stall of the receive process if not. But
this is not a regression, so it can be addressed in a future change.
Fixes: b6cb454185 ("net: stmmac: avoid rx queue overrun")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221010
Cc: stable@vger.kernel.org
Suggested-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Sam Edwards <CFSworks@gmail.com>
Link: https://patch.msgid.link/20260422044503.5349-1-CFSworks@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
PDC interrupts 122-125 were meant for ibi_i3c wakeup but qcs615 do not
support i3c. GPIOs 39,51,88 and 89 are also connected to different PDC
pin to support non-ibi wakeup. Update the wakeirq map to reflect same.
Fixes: b698f36a9d ("pinctrl: qcom: add the tlmm driver for QCS615 platform")
Signed-off-by: Maulik Shah <maulik.shah@oss.qualcomm.com>
Signed-off-by: Navya Malempati <navya.malempati@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Accessing the pinconf-pins sysfs node may deadlock.
pinconf_pins_show() holds pctldev->mutex, and the platform driver
calls pinctrl_find_gpio_range_from_pin(), which tries to acquire
the same mutex again, leading to a deadlock.
Use pinctrl_find_gpio_range_from_pin_nolock() to fix this issue.
Fixes: 6e9be3abb7 ("pinctrl: Add driver support for Amlogic SoCs")
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Various names for Qualcomm as a company are used in user-visible config
options: QCOM, Qualcomm and Qualcomm Technologies. Switch to unified
"Qualcomm" so it will be easier for users to identify the options when
for example running menuconfig.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
[linusw@kernel.org: Also fix the new IPQ9650]
Signed-off-by: Linus Walleij <linusw@kernel.org>
In parse_fw_cfg(), if fwnode_property_match_property_string() fails with
-ENOENT, the code returns directly and leaks the bitmap.
Use __free(bitmap) for automatic cleanup to fix the leak.
Fixes: 9c10525510 ("pinctrl: pinconf-generic: perform basic checks on pincfg properties")
Signed-off-by: Felix Gu <ustc.gu@gmail.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
QUP1_SE4 shares GPIO_36 & GPIO_37 for both L0/L1 and L3/L2 so the
function name cannot be the same or the alternate function cannot
be selected.
Split them up into individual lane functions so boards can specify.
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Several QUP lanes have MIRA/MIRB mirror routings which are collapsed
under a single function name (e.g. qup1_se6).
This is an issue because it means there are multiple functions defined
for a given pin that share the same name:
[42] = PINGROUP(42, qup1_se6, qup1_se2, qup1_se6...
So when you select pin 42 and request function qup1_se6, it will select
the first instance of it in this group, which just happens to be
QUP1_SE6_L2, making the second instance (QUP1_SE6_L1_MIRA) effectively
unreachable.
Split each of these lanes that has an alternative GPIO into their own
function so they can actually be selected, following the pattern seen
in pinctrl-sm8550.c.
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
QUP1_SE4 shares GPIO_36 & GPIO_37 for both L0/L1 and L3/L2 so the
function name cannot be the same or the alternate function cannot
be selected.
Split them up into individual lane functions so boards can specify.
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Several QUP lanes have MIRA/MIRB mirror routings that let the same lane
be muxed out on alternative GPIOs. On Eliza these were all collapsed
under the base function name (e.g. qup1_se6), which prevented boards
from selecting the mirror variants.
Add explicit function names for each mirror lane, matching the pattern
already established by qcom,sm8550-tlmm and related bindings.
Signed-off-by: Alexander Koskovich <akoskovich@pm.me>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
