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scsi: pm80xx: Avoid busywait in FW ready check

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In function check_fw_ready() we busy wait using udelay. The CPU is not
released and we see need_resched failures.

Busy waiting is not necessary since we are in process context and we can
sleep instead. Replace udelay with msleep of 20 ms intervals while waiting
for firmware to become ready.

It has been verified that check_fw_ready is not being used in interrupt
context anywhere, hence it is safe to make this change.

Link: https://lore.kernel.org/r/20201102165528.26510-4-Viswas.G@microchip.com.com
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: akshatzen <akshatzen@google.com>
Signed-off-by: Viswas G <Viswas.G@microchip.com>
Signed-off-by: Ruksar Devadi <Ruksar.devadi@microchip.com>
Signed-off-by: Radha Ramachandran <radha@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
akshatzen 2020-11-02 22:25:27 +05:30 • committed by Martin K. Petersen
commit 48cd6b38eb
2 changed files with 17 additions and 10 deletions
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