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linux/drivers/acpi/arm64
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Guanghui Feng c9af433b11 ACPI/IORT: Remove erroneous id_count check in iort_node_get_rmr_info() 
commit 003e6b56d7 upstream.

According to the ARM IORT specifications DEN 0049 issue E,
the "Number of IDs" field in the ID mapping format reports
the number of IDs in the mapping range minus one.

In iort_node_get_rmr_info(), we erroneously skip ID mappings
whose "Number of IDs" equal to 0, resulting in valid mapping
nodes with a single ID to map being skipped, which is wrong.

Fix iort_node_get_rmr_info() by removing the bogus id_count
check.

Fixes: 491cf4a673 ("ACPI/IORT: Add support to retrieve IORT RMR reserved regions")
Signed-off-by: Guanghui Feng <guanghuifeng@linux.alibaba.com>
Cc: <stable@vger.kernel.org> # 6.0.x
Acked-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/1689593625-45213-1-git-send-email-guanghuifeng@linux.alibaba.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2023-08-03 10:24:13 +02:00
..
agdi.c ACPI: AGDI: Fix missing prototype warning for acpi_agdi_init() 2022-05-06 20:35:44 +02:00
dma.c ACPI: scan: Support multiple DMA windows with different offsets 2022-09-24 18:39:21 +02:00
gtdt.c acpi/arm64: fix next_platform_timer() section mismatch error 2021-10-12 17:41:19 +01:00
iort.c ACPI/IORT: Remove erroneous id_count check in iort_node_get_rmr_info() 2023-08-03 10:24:13 +02:00
Kconfig ACPI: AGDI: Add driver for Arm Generic Diagnostic Dump and Reset device 2022-03-10 20:17:28 +01:00
Makefile ACPI: AGDI: Add driver for Arm Generic Diagnostic Dump and Reset device 2022-03-10 20:17:28 +01:00