xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

scsi: cxlflash: Flush pending commands in cleanup path

Browse Source 
When the AFU is reset in an error path, pending scsi commands can be
silently dropped without completion or a formal abort. This puts the onus
on the cxlflash driver to notify mid-layer and indicating that the command
can be retried.

Once the card has been quiesced, the hardware send queue lock is acquired
to prevent any data movement while the pending commands are processed.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Uma Krishnan
2017-06-21 21:14:56 -05:00
committed by Martin K. Petersen
parent a002bf830f
commit a1ea04b3eb
2 changed files with 57 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/scsi/cxlflash/common.h
View File

@@ -157,7 +157,9 @@ struct afu_cmd {
struct list_head queue;
u32 hwq_index;
u8 cmd_tmf:1;
u8 cmd_tmf:1,
cmd_aborted:1;
struct list_head list; /* Pending commands link */
/* As per the SISLITE spec the IOARCB EA has to be 16-byte aligned.
@@ -176,6 +178,7 @@ static inline struct afu_cmd *sc_to_afucz(struct scsi_cmnd *sc)
struct afu_cmd *afuc = sc_to_afuc(sc);
memset(afuc, 0, sizeof(*afuc));
INIT_LIST_HEAD(&afuc->queue);
return afuc;
}