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Xiaolei Wang 634d43a2da dmaengine: fsl-edma: Add judgment on enabling round robin arbitration 
[ Upstream commit 3448397a47 ]

Add judgment on enabling round robin arbitration to avoid
exceptions if this function is not supported.

Call trace:
 fsl_edma_resume_early+0x1d4/0x208
 dpm_run_callback+0xd4/0x304
 device_resume_early+0xb0/0x208
 dpm_resume_early+0x224/0x528
 suspend_devices_and_enter+0x3e4/0xd00
 pm_suspend+0x3c4/0x910
 state_store+0x90/0x124
 kobj_attr_store+0x48/0x64
 sysfs_kf_write+0x84/0xb4
 kernfs_fop_write_iter+0x19c/0x264
 vfs_write+0x664/0x858
 ksys_write+0xc8/0x180
 __arm64_sys_write+0x44/0x58
 invoke_syscall+0x5c/0x178
 el0_svc_common.constprop.0+0x11c/0x14c
 do_el0_svc+0x30/0x40
 el0_svc+0x58/0xa8
 el0t_64_sync_handler+0xc0/0xc4
 el0t_64_sync+0x190/0x194

Fixes: 72f5801a4e ("dmaengine: fsl-edma: integrate v3 support")
Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20231113225713.1892643-3-xiaolei.wang@windriver.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-01-10 17:16:57 +01:00
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README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.