Re: [PATCH 07/19] scsi: sd: Do not issue commands to suspended disks on remove

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On Mon, Sep 11, 2023 at 01:02:05PM +0900, Damien Le Moal wrote:
> If an error occurs when resuming a host adapter before the devices
> attached to the adapter are resumed, the adapter low level driver may
> remove the scsi host, resulting in a call to sd_remove() for the
> disks of the host. However, since this function calls sd_shutdown(),
> a synchronize cache command and a start stop unit may be issued with the
> drive still sleeping and the HBA non-functional. This causes PM resume
> to hang, forcing a reset of the machine to recover.
> 
> Fix this by checking a device host state in sd_shutdown() and by
> returning early doing nothing if the host state is not SHOST_RUNNING.
> 
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Damien Le Moal <dlemoal@xxxxxxxxxx>
Tested-by: Chia-Lin Kao (AceLan) <acelan.kao@xxxxxxxxxxxxx>



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