[PATCH] nvme: don't apply NVME_QUIRK_DEALLOCATE_ZEROES when DSM is not supported

[Chaitanya Kulkarni]

On 11/26/24 22:42, Christoph Hellwig wrote:
> Commit 63dfa1004322 ("nvme: move NVME_QUIRK_DEALLOCATE_ZEROES out of
> nvme_config_discard") started applying the NVME_QUIRK_DEALLOCATE_ZEROES
> quirk even then the Dataset Management is not supported.  It turns out
> that there versions of these old Intel SSDs that have DSM support
> disabled in the firmware, which will now lead to errors everytime
> a Write Zeroes command is issued.  Fix this by checking for DSM support
> before applying the quirk.
>
> Reported-by: Saeed Mirzamohammadi<saeed.mirzamohammadi at oracle.com>
> Fixes: 63dfa1004322 ("nvme: move NVME_QUIRK_DEALLOCATE_ZEROES out of nvme_config_discard")
> Tested-by: Saeed Mirzamohammadi<saeed.mirzamohammadi at oracle.com>
> Signed-off-by: Christoph Hellwig<hch at lst.de>

Looks good.

Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>

-ck