media: staging/ipu7: Ignore interrupts when device is suspended

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[ Upstream commit 9ad65684b9 ]

IPU7 devices have shared interrupts with others. In some case when IPU7
device is suspended, driver get unexpected interrupt and invalid irq
status 0xffffffff from ISR_STATUS and PB LOCAL_STATUS registers as
interrupt is triggered from other device on shared irq line.

In order to avoid this issue use pm_runtime_get_if_active() to check if
IPU7 device is resumed, ignore the invalid irq status and use
synchronize_irq() in suspend.

Cc: Stable@vger.kernel.org
Fixes: b7fe4c0019 ("media: staging/ipu7: add Intel IPU7 PCI device driver")
Signed-off-by: Bingbu Cao <bingbu.cao@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Bingbu Cao 2025-12-23 15:23:00 +08:00 • committed by Sasha Levin

parent 364759ccc3

commit 9a8c3cd8a0

2 changed files with 20 additions and 1 deletions

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17

drivers/staging/media/ipu7/ipu7-buttress.c

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4

drivers/staging/media/ipu7/ipu7.c

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