On Mon, Sep 11, 2023 at 01:01:59PM +0900, Damien Le Moal wrote:
> The function ata_port_request_pm() checks the port flag
> ATA_PFLAG_PM_PENDING and calls ata_port_wait_eh() if this flag is set to
> ensure that power management operations for a port are not secheduled
> simultaneously. However, this flag check is done without holding the
> port lock.
>
> Fix this by taking the port lock on entry to the function and checking
> the flag under this lock. The lock is released and re-taken if
> ata_port_wait_eh() needs to be called.
>
> Fixes: 5ef41082912b ("ata: add ata port system PM callbacks")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Tested-by: Chia-Lin Kao (AceLan) <acelan.kao@xxxxxxxxxxxxx>
