ATA and SATA drives have had built-in retries for media errors for as long as they've been commonplace in computers (early 1990s). When libata stumbles across a bad sector, it can waste minutes sitting there doing retry after retry before finally giving up and letting the higher layers deal with it. This patch removes retries for media errors only. Signed-off-by: Mark Lord <mlord@xxxxxxxxx> --- version 2; the original patch changed more than intended. --- linux/drivers/ata/libata-eh.c.orig 2012-04-27 13:17:35.000000000 -0400 +++ linux/drivers/ata/libata-eh.c 2012-05-01 22:40:00.182425015 -0400 @@ -2122,7 +2122,8 @@ if (qc->flags & ATA_QCFLAG_IO || (!(qc->err_mask & AC_ERR_INVALID) && qc->err_mask != AC_ERR_DEV)) - qc->flags |= ATA_QCFLAG_RETRY; + if (!(qc->err_mask & AC_ERR_MEDIA)) + qc->flags |= ATA_QCFLAG_RETRY; /* accumulate error info */ ehc->i.dev = qc->dev;
--- linux/drivers/ata/libata-eh.c.orig 2012-04-27 13:17:35.000000000 -0400 +++ linux/drivers/ata/libata-eh.c 2012-05-01 22:40:00.182425015 -0400 @@ -2122,7 +2122,8 @@ if (qc->flags & ATA_QCFLAG_IO || (!(qc->err_mask & AC_ERR_INVALID) && qc->err_mask != AC_ERR_DEV)) - qc->flags |= ATA_QCFLAG_RETRY; + if (!(qc->err_mask & AC_ERR_MEDIA)) + qc->flags |= ATA_QCFLAG_RETRY; /* accumulate error info */ ehc->i.dev = qc->dev;
