Eric Pilmore 95e5fda3b5 ptdma: pt_core_execute_cmd() should use spinlock ...

The interrupt handler (pt_core_irq_handler()) of the ptdma
driver can be called from interrupt context. The code flow
in this function can lead down to pt_core_execute_cmd() which
will attempt to grab a mutex, which is not appropriate in
interrupt context and ultimately leads to a kernel panic.
The fix here changes this mutex to a spinlock, which has
been verified to resolve the issue.

Fixes: fa5d823b16a9 ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: Eric Pilmore <epilmore@gigaio.com>
Link: https://lore.kernel.org/r/20230119033907.35071-1-epilmore@gigaio.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

2023-01-19 18:59:34 +05:30

..

Kconfig

dmaengine: ptdma: register PTDMA controller as a DMA resource

2021-08-29 19:14:20 +05:30

Makefile

dmaengine: ptdma: Add debugfs entries for PTDMA

2021-08-29 19:14:20 +05:30

ptdma-debugfs.c

dmaengine: ptdma: Add debugfs entries for PTDMA

2021-08-29 19:14:20 +05:30

ptdma-dev.c

ptdma: pt_core_execute_cmd() should use spinlock

2023-01-19 18:59:34 +05:30

ptdma-dmaengine.c

dmaengine: ptdma: statify pt_tx_status

2022-04-22 11:29:13 +05:30

ptdma-pci.c

…

ptdma.h

ptdma: pt_core_execute_cmd() should use spinlock

2023-01-19 18:59:34 +05:30