libata: stop being overjealous about non-IO commands

libata EH always revalidated device and retried failed command after
error except for ATAPI CCs.  This is unnecessary and hinders with
users issuing direct commands.  This patch makes the following
changes.

* Make sata_sil24 not request ATA_EH_REVALIDATE on device errors.
  sil24 is the only driver which does this.  All others let libata EH
  core code decide.

* Don't request revalidation after device error of non-IO command.
  Revalidation doesn't really help anybody.  As ATA_EH_REVALIDATE
  isn't set by default, there's no reason to clear it after sense data
  is read.  Kill ATA_EH_REVALIDATE clearing code while at it.

* Don't retry non-IO command after device error.  Device has rejected
  the command.  There's no point in retrying.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 3c481e0e0c03..187dcb02c681 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -265,11 +265,11 @@ static struct sil24_cerr_info {
         unsigned int err_mask, action;
         const char *desc;
 } sil24_cerr_db[] = {
-        [0]                     = { AC_ERR_DEV, ATA_EH_REVALIDATE,
+        [0]                     = { AC_ERR_DEV, 0,
                                     "device error" },
-        [PORT_CERR_DEV]         = { AC_ERR_DEV, ATA_EH_REVALIDATE,
+        [PORT_CERR_DEV]         = { AC_ERR_DEV, 0,
                                     "device error via D2H FIS" },
-        [PORT_CERR_SDB]         = { AC_ERR_DEV, ATA_EH_REVALIDATE,
+        [PORT_CERR_SDB]         = { AC_ERR_DEV, 0,
                                     "device error via SDB FIS" },
         [PORT_CERR_DATA]        = { AC_ERR_ATA_BUS, ATA_EH_SOFTRESET,
                                     "error in data FIS" },