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4421fe5332
While performing suspend/resume, we were getting below kernel crash. [ 54.541672] [FTS][Info]gesture suspend... [ 54.605256] [FTS][Error][GESTURE]Enter into gesture(suspend) failed! [ 54.605256] [ 58.345850] irq event 10: bogus return value fffffff3 ...... [ 58.345966] [<ffff0000080830f0>] el1_irq+0xb0/0x124 [ 58.345971] [<ffff000008085360>] arch_cpu_idle+0x10/0x18 [ 58.345975] [<ffff0000081077f4>] do_idle+0x1ac/0x1e0 [ 58.345979] [<ffff0000081079c8>] cpu_startup_entry+0x20/0x28 [ 58.345983] [<ffff000008a80ed0>] rest_init+0xd0/0xdc [ 58.345988] [<ffff0000091c0b48>] start_kernel+0x390/0x3a4 [ 58.345990] handlers: [ 58.345994] [<ffff0000085120d0>] bam_dma_irq The reason for the crash we found is, bam_dma_irq() was returning negative value when the device resumes in some conditions. In addition, the irq handler should have one of the below return values. IRQ_NONE interrupt was not from this device or was not handled IRQ_HANDLED interrupt was handled by this device IRQ_WAKE_THREAD handler requests to wake the handler thread Therefore, to resolve this crash, we have changed the return value to IRQ_NONE. Signed-off-by: Parth Y Shah <sparth1292@gmail.com> Link: https://lore.kernel.org/r/1607322820-7450-1-git-send-email-sparth1292@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org> |
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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.