This is a note to let you know that I've just added the patch titled dmaengine: acpi: Avoid comparison GSI with Linux vIRQ to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dmaengine-acpi-avoid-comparison-gsi-with-linux-virq.patch and it can be found in the queue-4.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 67db87dc8284070adb15b3c02c1c31d5cf51c5d6 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Date: Fri, 30 Jul 2021 23:27:15 +0300 Subject: dmaengine: acpi: Avoid comparison GSI with Linux vIRQ From: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> commit 67db87dc8284070adb15b3c02c1c31d5cf51c5d6 upstream. Currently the CRST parsing relies on the fact that on most of x86 devices the IRQ mapping is 1:1 with Linux vIRQ. However, it may be not true for some. Fix this by converting GSI to Linux vIRQ before checking it. Fixes: ee8209fd026b ("dma: acpi-dma: parse CSRT to extract additional resources") Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210730202715.24375-1-andriy.shevchenko@xxxxxxxxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/dma/acpi-dma.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/dma/acpi-dma.c +++ b/drivers/dma/acpi-dma.c @@ -72,10 +72,14 @@ static int acpi_dma_parse_resource_group si = (const struct acpi_csrt_shared_info *)&grp[1]; - /* Match device by MMIO and IRQ */ + /* Match device by MMIO */ if (si->mmio_base_low != lower_32_bits(mem) || - si->mmio_base_high != upper_32_bits(mem) || - si->gsi_interrupt != irq) + si->mmio_base_high != upper_32_bits(mem)) + return 0; + + /* Match device by Linux vIRQ */ + ret = acpi_register_gsi(NULL, si->gsi_interrupt, si->interrupt_mode, si->interrupt_polarity); + if (ret != irq) return 0; dev_dbg(&adev->dev, "matches with %.4s%04X (rev %u)\n", Patches currently in stable-queue which might be from andriy.shevchenko@xxxxxxxxxxxxxxx are queue-4.14/dmaengine-acpi-avoid-comparison-gsi-with-linux-virq.patch queue-4.14/apparmor-remove-duplicate-macro-list_entry_is_head.patch