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Nicolas Saenz Julienne 86f5b09369 spi: Skip zero-length transfers in spi_transfer_one_message() 
[ Upstream commit b306320322 ]

With the introduction of 26751de25d ("spi: bcm2835: Micro-optimise
FIFO loops") it has become apparent that some users might initiate
zero-length SPI transfers. A fact the micro-optimization omitted, and
which turned out to cause crashes[1].

Instead of changing the micro-optimization itself, use a bigger hammer
and skip zero-length transfers altogether for drivers using the default
transfer_one_message() implementation.

Reported-by: Phil Elwell <phil@raspberrypi.com>
Fixes: 26751de25d ("spi: bcm2835: Micro-optimise FIFO loops")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

[1] https://github.com/raspberrypi/linux/issues/4100
Link: https://lore.kernel.org/r/20210211180820.25757-1-nsaenzjulienne@suse.de

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2021-03-04 11:38:07 +01:00
..
accessibility speakup: fix uninitialized flush_lock 2020-12-30 11:53:44 +01:00
acpi ACPI/IORT: Do not blindly trust DMA masks from firmware 2021-02-03 23:28:50 +01:00
amba amba: Fix resource leak for drivers without .remove 2021-03-04 11:38:02 +01:00
android binder: add flag to clear buffer on txn complete 2020-12-30 11:54:09 +01:00
ata ata: ahci_brcm: Add back regulators management 2021-03-04 11:37:45 +01:00
atm atm: idt77252: call pci_disable_device() on error path 2021-01-12 20:18:09 +01:00
auxdisplay auxdisplay: ht16k33: Fix refresh rate handling 2021-03-04 11:38:00 +01:00
base media: software_node: Fix refcounts in software_node_get_next_child() 2021-03-04 11:37:42 +01:00
bcma bcma: use semicolons rather than commas to separate statements 2020-10-01 16:23:50 +03:00
block xen-blkback: fix error handling in xen_blkbk_map() 2021-02-23 15:53:24 +01:00
bluetooth tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer 2021-03-04 11:37:36 +01:00
bus bus: fsl-mc: fix error return code in fsl_mc_object_allocate() 2020-12-30 11:53:46 +01:00
cdrom gdrom: use bdev_check_media_change 2020-09-10 09:32:31 -06:00
char hwrng: timeriomem - Fix cooldown period calculation 2021-03-04 11:37:49 +01:00
clk clk: aspeed: Fix APLL calculate formula from ast2600-A2 2021-03-04 11:38:06 +01:00
clocksource clocksource/drivers/mxs_timer: Add missing semicolon when DEBUG is defined 2021-03-04 11:37:57 +01:00
connector connector: simplify the return expression of cn_add_callback() 2020-09-21 13:48:29 -07:00
counter counter:ti-eqep: remove floor 2021-01-27 11:55:12 +01:00
cpufreq cpufreq: brcmstb-avs-cpufreq: Fix resource leaks in ->remove() 2021-03-04 11:37:24 +01:00
cpuidle cpuidle: tegra: Annotate tegra_pm_set_cpu_in_lp2() with RCU_NONIDLE 2020-11-16 13:24:32 +01:00
crypto crypto: talitos - Fix ctr(aes) on SEC1 2021-03-04 11:37:45 +01:00
dax device-dax: Fix range release 2021-01-06 14:56:56 +01:00
dca dca: Use PTR_ERR_OR_ZERO() to simplify code 2020-05-15 16:25:20 +02:00
devfreq PM / devfreq: tegra30: Improve initial hardware resetting 2020-09-29 17:50:10 +09:00
dio maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
dma dmaengine: idxd: set DMA channel to be private 2021-03-04 11:37:57 +01:00
dma-buf dmabuf: fix use-after-free of dmabuf's file->f_inode 2021-01-12 20:18:24 +01:00
edac EDAC/amd64: Fix PCI component registration 2020-12-30 11:54:11 +01:00
eisa treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
extcon extcon: max77693: Fix modalias string 2020-12-30 11:53:49 +01:00
firewire firewire-ohci: use dma_alloc_pages 2020-09-25 06:20:48 +02:00
firmware firmware: arm_scmi: Fix call site of scmi_notification_exit 2021-03-04 11:37:23 +01:00
fpga fpga: Specify HAS_IOMEM dependency for FPGA_DFL 2020-12-01 18:46:24 +01:00
fsi fsi: Aspeed: Add mutex to protect HW access 2020-12-30 11:53:46 +01:00
gnss treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
gpio gpio: ep93xx: Fix single irqchip with multi gpiochips 2021-02-17 11:02:20 +01:00
gpu drm/amdgpu/display: remove hdcp_srm sysfs on device removal 2021-03-04 11:37:52 +01:00
greybus drivers/greybus: Use kobj_to_dev() 2020-09-04 18:06:01 +02:00
hid HID: core: detect and skip invalid inputs to snto32() 2021-03-04 11:37:54 +01:00
hsi HSI: Fix PM usage counter unbalance in ssi_hw_init 2021-03-04 11:37:52 +01:00
hv Drivers: hv: vmbus: Avoid use-after-free in vmbus_onoffer_rescind() 2021-03-04 11:37:46 +01:00
hwmon hwmon: (dell-smm) Add XPS 15 L502X to fan control blacklist 2021-02-26 10:13:00 +01:00
hwspinlock hwspinlock: qcom: Allow mmio usage in addition to syscon 2020-07-13 22:29:28 -07:00
hwtracing stm class: Fix module init return on allocation failure 2021-01-27 11:55:15 +01:00
i2c i2c: qcom-geni: Store DMA mapping data in geni_i2c_dev struct 2021-03-04 11:38:02 +01:00
i3c i3c master: fix missing destroy_workqueue() on error in i3c_master_register 2021-01-06 14:56:53 +01:00
ide scsi: ide: Mark power management requests with RQF_PM instead of RQF_PREEMPT 2021-01-12 20:18:15 +01:00
idle intel_idle: Build fix 2020-12-03 10:00:23 +01:00
iio iio: adc: ti_am335x_adc: remove omitted iio_kfifo_free() 2021-01-27 11:55:12 +01:00
infiniband RDMA/hns: Disable RQ inline by default 2021-03-04 11:38:06 +01:00
input tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer 2021-03-04 11:37:36 +01:00
interconnect interconnect: imx8mq: Use icc_sync_state 2021-01-27 11:55:29 +01:00
iommu iommu: Properly pass gfp_t in _iommu_map() to avoid atomic sleeping 2021-03-04 11:38:03 +01:00
ipack treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
irqchip irqchip/imx: IMX_INTMUX should not default to y, unconditionally 2021-03-04 11:37:51 +01:00
isdn misdn: dsp: select CONFIG_BITREVERSE 2021-01-19 18:27:26 +01:00
leds leds: trigger: fix potential deadlock with libata 2021-02-03 23:28:41 +01:00
lightnvm lightnvm: fix memory leak when submit fails 2021-01-27 11:55:22 +01:00
macintosh macintosh/adb-iop: Use big-endian autopoll mask 2021-03-04 11:37:42 +01:00
mailbox mailbox: arm_mhu_db: Fix mhu_db_shutdown by replacing kfree with devm_kfree 2020-12-30 11:53:28 +01:00
mcb drivers: mcb: use symbol namespaces 2019-11-03 19:54:53 +01:00
md md: Set prev_flush_start and flush_bio in an atomic way 2021-02-10 09:29:22 +01:00
media media: uvcvideo: Accept invalid bFormatIndex and bFrameIndex values 2021-03-04 11:37:43 +01:00
memory memory: ti-aemif: Drop child node when jumping out loop 2021-03-04 11:37:25 +01:00
memstick memstick: r592: Fix error return in r592_probe() 2020-12-30 11:53:34 +01:00
message scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove() 2020-10-26 16:57:18 -04:00
mfd mfd: wm831x-auxadc: Prevent use after free in wm831x_auxadc_read_irq() 2021-03-04 11:38:04 +01:00
misc lkdtm: don't move ctors to .rodata 2021-02-17 11:02:24 +01:00
mmc mmc: renesas_sdhi_internal_dmac: Fix DMA buffer alignment from 8 to 128-bytes 2021-03-04 11:38:02 +01:00
most drivers: most: add character device interface driver 2020-09-07 15:16:26 +02:00
mtd mtd: parsers: afs: Fix freeing the part name memory in failure 2021-03-04 11:37:45 +01:00
mux treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
net tty: convert tty_ldisc_ops 'read()' function to take a kernel pointer 2021-03-04 11:37:36 +01:00
nfc nfc: s3fwrn5: Release the nfc firmware 2020-12-30 11:53:53 +01:00
ntb Bug fixes for v5.10 2020-10-25 11:12:31 -07:00
nubus nubus: Remove cast to void pointer 2019-10-21 09:08:15 +02:00
nvdimm libnvdimm/dimm: Avoid race between probe and available_slots_show() 2021-02-10 09:29:17 +01:00
nvme nvmet: set status to 0 in case for invalid nsid 2021-03-04 11:37:50 +01:00
nvmem nvmem: core: fix possibly memleak when use nvmem_cell_info_to_nvmem_cell() 2020-09-27 14:25:48 +02:00
of of/fdt: Make sure no-map does not remove already reserved regions 2021-03-04 11:37:56 +01:00
opp opp: Correct debug message in _opp_add_static_v2() 2021-03-04 11:37:27 +01:00
oprofile module: Fix up module_notifier return values 2020-09-01 09:58:03 +02:00
parisc dma-mapping: split <linux/dma-mapping.h> 2020-10-06 07:07:03 +02:00
parport treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
pci PCI: Decline to resize resources if boot config must be preserved 2021-03-04 11:37:18 +01:00
pcmcia dma-mapping: remove DMA_MASK_NONE 2020-09-25 06:12:15 +02:00
perf perf/arm-cmn: Move IRQs when migrating context 2021-03-04 11:37:44 +01:00
phy phy: cpcap-usb: Fix warning for missing regulator_disable 2021-02-07 15:37:13 +01:00
pinctrl pinctrl: qcom: Don't clear pending interrupts when enabling 2021-01-27 11:55:27 +01:00
platform platform/chrome: cros_ec_proto: Add LID and BATTERY to default mask 2021-03-04 11:37:58 +01:00
pnp PNP: fix kernel-doc markups 2020-10-27 19:23:04 +01:00
power power: supply: smb347-charger: Fix interrupt usage if interrupt is unavailable 2021-03-04 11:37:59 +01:00
powercap Merge branch 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2020-11-10 10:02:31 -08:00
pps treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
ps3 powerpc/ps3: use dma_mapping_error() 2020-12-30 11:53:53 +01:00
ptp phy: dp83640: select CONFIG_CRC32 2021-01-17 14:17:02 +01:00
pwm pwm: sun4i: Remove erroneous else branch 2020-12-30 11:53:59 +01:00
rapidio rapidio: fix the missed put_device() for rio_mport_add_riodev 2020-10-16 11:11:22 -07:00
ras RAS/CEC: Convert to DEFINE_SHOW_ATTRIBUTE() 2020-09-25 19:05:31 +02:00
regulator regulator: bd718x7, bd71828, Fix dvs voltage levels 2021-03-04 11:38:07 +01:00
remoteproc remoteproc: sysmon: Ensure remote notification ordering 2020-12-30 11:54:28 +01:00
reset ARM: SoC-related driver updates 2020-10-24 10:39:22 -07:00
rpmsg rpmsg updates for 5.10 2020-10-22 12:58:21 -07:00
rtc rtc: zynqmp: depend on HAS_IOMEM 2021-03-04 11:38:03 +01:00
s390 s390/zcrypt: return EIO when msg retry limit reached 2021-03-04 11:37:48 +01:00
sbus treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
scsi scsi: lpfc: Fix ancient double free 2021-03-04 11:38:01 +01:00
sfi treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
sh iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
siox siox: Use the correct style for SPDX License Identifier 2020-01-14 21:46:53 +01:00
slimbus slimbus: qcom: fix potential NULL dereference in qcom_slim_prg_slew() 2020-12-30 11:53:47 +01:00
soc soc: aspeed: snoop: Add clock control logic 2021-03-04 11:37:29 +01:00
soundwire soundwire: master: use pm_runtime_set_active() on add 2020-12-30 11:53:28 +01:00
spi spi: Skip zero-length transfers in spi_transfer_one_message() 2021-03-04 11:38:07 +01:00
spmi spmi: pmic-arb: Set lockdep class for hierarchical irq domains 2020-02-10 13:16:04 +01:00
ssb ssb: Remove meaningless jump label to simplify the code 2020-09-21 16:01:35 +03:00
staging media: atomisp: Fix a buffer overflow in debug code 2021-03-04 11:37:43 +01:00
target cxgb4/chtls/cxgbit: Keeping the max ofld immediate data size same in cxgb4 and ulds 2021-03-04 11:37:34 +01:00
tc The main MIPS changes for 5.6: 2020-01-31 11:28:31 -08:00
tee optee: simplify i2c access 2021-03-04 11:37:28 +01:00
thermal thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed 2020-12-30 11:54:29 +01:00
thunderbolt thunderbolt: Fix possible NULL pointer dereference in tb_acpi_add_link() 2021-02-10 09:29:15 +01:00
tty tty: implement read_iter 2021-03-04 11:37:36 +01:00
uio uio: Fix use-after-free in uio_unregister_device() 2020-11-09 18:54:30 +01:00
usb usb: dwc2: Make "trimming xfer length" a debug message 2021-03-04 11:37:26 +01:00
vdpa vdpa/mlx5: fix param validation in mlx5_vdpa_get_config() 2021-03-04 11:37:17 +01:00
vfio vfio/pci/nvlink2: Do not attempt NPU2 setup on POWER8NVL NPU 2020-12-30 11:54:03 +01:00
vhost vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-01-12 20:18:13 +01:00
video fbdev: aty: SPARC64 requires FB_ATY_CT 2021-03-04 11:37:36 +01:00
virt virt: vbox: Do not use wait_event_interruptible when called from kernel context 2021-03-04 11:37:18 +01:00
virtio virtio_ring: Fix two use after free bugs 2020-12-30 11:54:00 +01:00
visorbus treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
vlynq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102 2019-05-24 17:39:00 +02:00
vme treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
w1 w1: w1_therm: Fix conversion result for negative temperatures 2021-03-04 11:37:18 +01:00
watchdog watchdog: intel-mid_wdt: Postpone IRQ handler registration till SCU is ready 2021-03-04 11:38:00 +01:00
xen xen-scsiback: don't "handle" error by BUG() 2021-02-23 15:53:24 +01:00
zorro zorro: Fix address space collision message with RAM expansion boards 2020-08-26 13:26:52 +02:00
Kconfig virtio: fixes, vdpa 2020-04-08 10:51:53 -07:00
Makefile vdpa: mlx5: fix vdpa/vhost dependencies 2020-12-02 04:09:56 -05:00