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authorMartin K. Petersen <martin.petersen@oracle.com>2024-08-17 02:53:10 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2024-08-17 03:16:49 +0200
commitcbaac68987b8699397df29413b33bd51f5255255 (patch)
tree460ad206a5c952ece54c18bb3e6bf82372dd67d0 /drivers/scsi
parentscsi: MAINTAINERS: Add header files to SCSI SUBSYSTEM (diff)
downloadlinux-cbaac68987b8699397df29413b33bd51f5255255.tar.xz
linux-cbaac68987b8699397df29413b33bd51f5255255.zip
scsi: sd: Do not attempt to configure discard unless LBPME is set
Commit f874d7210d88 ("scsi: sd: Keep the discard mode stable") attempted to address an issue where one mode of discard operation got configured prior to the device completing full discovery. Unfortunately this change assumed discard was always enabled on the device. Do not attempt to configure discard unless LBPME is enabled. Link: https://lore.kernel.org/r/20240817005325.3319384-1-martin.petersen@oracle.com Fixes: f874d7210d88 ("scsi: sd: Keep the discard mode stable") Reported-by: Chris Bainbridge <chris.bainbridge@gmail.com> Tested-by: Chris Bainbridge <chris.bainbridge@gmail.com> Tested-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com> Tested-by: John Garry <john.g.garry@oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/sd.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 699f4f9674d9..dad3991397cf 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -3308,6 +3308,9 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer)
static unsigned int sd_discard_mode(struct scsi_disk *sdkp)
{
+ if (!sdkp->lbpme)
+ return SD_LBP_FULL;
+
if (!sdkp->lbpvpd) {
/* LBP VPD page not provided */
if (sdkp->max_unmap_blocks)