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dmaengine: acpi: Avoid comparison GSI with Linux vIRQ

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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@linux.intel.com>
Link: https://lore.kernel.org/r/20210730202715.24375-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2021-07-30 23:27:15 +03:00 committed by Greg Kroah-Hartman
parent 4d2de0d232
commit e5261b31fa
1 changed files with 7 additions and 3 deletions
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10
drivers/dma/acpi-dma.c
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@ -72,10 +72,14 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
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",