scsi: ufs: core: Support Updating UIC Command Timeout

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The default UIC command timeout still remains 500ms.  Allow platform
drivers to override the UIC command timeout if desired.

In a real product, the 500ms timeout value is probably good enough.
However, during the product development where there are a lot of logging
and debug messages being printed to the UART console, interrupt starvations
happen occasionally because the UART may print long debug messages from
different modules in the system.  While printing, the UART may have
interrupts disabled for more than 500ms, causing UIC command timeout.  The
UIC command timeout would trigger more printing from the UFS driver, and
eventually a watchdog timeout may occur unnecessarily.

Add support for overriding the UIC command timeout value with the newly
created uic_cmd_timeout kernel module parameter.  Default value is
500ms. Supported values range from 500ms to 2 seconds.

Signed-off-by: Bao D. Nguyen <quic_nguyenb@quicinc.com>
Link: https://lore.kernel.org/r/e4e1c87f3f867f270a3d4b5d57a00139ff0e9741.1721792309.git.quic_nguyenb@quicinc.com
Suggested-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

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Bao D. Nguyen 2024-07-23 20:49:32 -07:00 • committed by Martin K. Petersen

parent 15f7b71b9d

commit 88e6804fb3

1 changed files with 24 additions and 5 deletions

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drivers/ufs/core/ufshcd.c

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