diff options
| author | Faiz Abbas | 2019-10-15 18:24:34 +0530 |
|---|---|---|
| committer | Tom Rini | 2019-10-23 20:47:12 -0400 |
| commit | d48f00ed11d04eb76d4510b3db1d7f36f758d4e9 (patch) | |
| tree | 95b6c6860d7c74934c14c2a1a0d1976ed413b144 | |
| parent | 4ff572830eb1ae95fa85f8ab585521ccc1d86845 (diff) | |
scsi: Retry inquiry 3 times to overcome Unit Attention condition
The UFS SCSI device LUNs are observed to return failure the first time a
unit ready inquiry is sent and pass on the second try. Send this
inquiry 3 times to make sure device is ready.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
| -rw-r--r-- | drivers/scsi/scsi.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index e55bb256a9d..0639eb6b310 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -481,6 +481,7 @@ static int scsi_detect_dev(struct udevice *dev, int target, int lun, lbaint_t capacity; unsigned long blksz; struct scsi_cmd *pccb = (struct scsi_cmd *)&tempccb; + int count, err; pccb->target = target; pccb->lun = lun; @@ -516,9 +517,14 @@ static int scsi_detect_dev(struct udevice *dev, int target, int lun, dev_desc->target = pccb->target; dev_desc->lun = pccb->lun; - pccb->datalen = 0; - scsi_setup_test_unit_ready(pccb); - if (scsi_exec(dev, pccb)) { + for (count = 0; count < 3; count++) { + pccb->datalen = 0; + scsi_setup_test_unit_ready(pccb); + err = scsi_exec(dev, pccb); + if (!err) + break; + } + if (err) { if (dev_desc->removable) { dev_desc->type = perq; goto removable; |