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Mark Salter 500a988948 drivers/perf: thunderx2_pmu: Fix memory resource error handling

[ Upstream commit 688494a407d1419a6b158c644b262c61cde39f48 ]

In tx2_uncore_pmu_init_dev(), a call to acpi_dev_get_resources() is used
to create a list _CRS resources which is searched for the device base
address. There is an error check following this:

   if (!rentry->res)
           return NULL

In no case, will rentry->res be NULL, so the test is useless. Even
if the test worked, it comes before the resource list memory is
freed. None of this really matters as long as the ACPI table has
the memory resource. Let's clean it up so that it makes sense and
will give a meaningful error should firmware leave out the memory
resource.

Fixes: 69c32972d593 ("drivers/perf: Add Cavium ThunderX2 SoC UNCORE PMU driver")
Signed-off-by: Mark Salter <msalter@redhat.com>
Link: https://lore.kernel.org/r/20200915204110.326138-2-msalter@redhat.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-10-29 09:57:30 +01:00

hisilicon

drivers/perf: Prevent forced unbinding of PMU drivers

2020-07-29 10:18:40 +02:00

arm_dsu_pmu.c

drivers/perf: Prevent forced unbinding of PMU drivers

2020-07-29 10:18:40 +02:00

arm_pmu_acpi.c

drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer

2020-03-25 08:25:47 +01:00

arm_pmu_platform.c

perf: Convert to using %pOFn instead of device_node.name