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| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-08-24 18:06:36 +0300 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2018-08-24 18:50:29 +0300 |
| commit | 3fc7c5c0cff3150e471f5fd12f59971c6d2c6513 (patch) | |
| tree | 34f6108a8a74f52907f0a5c74b9f6d879643ffca /arch/powerpc/kernel/setup-common.c | |
| parent | 7db7a8f5638a2ffe0c0c0d55b5186b6191fd6af7 (diff) | |
| download | linux-3fc7c5c0cff3150e471f5fd12f59971c6d2c6513.tar.xz | |
iommu/rockchip: Handle errors returned from PM framework
pm_runtime_get_if_in_use can fail: either PM has been disabled
altogether (-EINVAL), or the device hasn't been enabled yet (0).
Sadly, the Rockchip IOMMU driver tends to conflate the two things
by considering a non-zero return value as successful.
This has the consequence of hiding other bugs, so let's handle this
case throughout the driver, with a WARN_ON_ONCE so that we can try
and work out what happened.
Fixes: 0f181d3cf7d98 ("iommu/rockchip: Add runtime PM support")
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
0 files changed, 0 insertions, 0 deletions