iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ata: libata-eh: Clarify ata_eh_qc_retry() behavior at call site

Browse Source 
While the function documentation for ata_eh_qc_retry() is clear,
from simply reading the single function that calls ata_eh_qc_retry(),
it is not clear that ata_eh_qc_retry() might not retry the command.

Add a comment in the single function that calls ata_eh_qc_retry() to
clarify the behavior.

[Damien] Added curly braces to "if () else" with multi-line comment.

Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
This commit is contained in:
Niklas Cassel 2023-05-19 12:40:02 +02:00 committed by Damien Le Moal
parent a5ae12c87d
commit e4c26a1b74
1 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/ata/libata-eh.c
View File

@ -3813,16 +3813,29 @@ void ata_eh_finish(struct ata_port *ap)
* generate sense data in this function,
* considering both err_mask and tf.
*/
if (qc->flags & ATA_QCFLAG_RETRY)
if (qc->flags & ATA_QCFLAG_RETRY) {
/*
* Since qc->err_mask is set, ata_eh_qc_retry()
* will not increment scmd->allowed, so upper
* layer will only retry the command if it has
* not already been retried too many times.
*/
ata_eh_qc_retry(qc);
else
} else {
ata_eh_qc_complete(qc);
}
} else {
if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
ata_eh_qc_complete(qc);
} else {
/* feed zero TF to sense generation */
memset(&qc->result_tf, 0, sizeof(qc->result_tf));
/*
* Since qc->err_mask is not set,
* ata_eh_qc_retry() will increment
* scmd->allowed, so upper layer is guaranteed
* to retry the command.
*/
ata_eh_qc_retry(qc);
}
}