-stable review patch. If anyone has any objections, please let us know.
------------------
From: Tejun Heo <[email protected]>
All softreset methods are responsible for detecting device presence
and succeed softreset in such cases. AHCI didn't use to check for
device presence before proceeding with softreset and this caused
unnecessary reset retrials during probing. This patch adds presence
detection to AHCI softreset.
Signed-off-by: Tejun Heo <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
Cc: Daniel Drake <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/scsi/ahci.c | 6 ++++++
1 file changed, 6 insertions(+)
--- linux-2.6.17.13.orig/drivers/scsi/ahci.c
+++ linux-2.6.17.13/drivers/scsi/ahci.c
@@ -548,6 +548,12 @@ static int ahci_softreset(struct ata_por
DPRINTK("ENTER\n");
+ if (!sata_dev_present(ap)) {
+ DPRINTK("PHY reports no device\n");
+ *class = ATA_DEV_NONE;
+ return 0;
+ }
+
/* prepare for SRST (AHCI-1.1 10.4.1) */
rc = ahci_stop_engine(ap);
if (rc) {
--
-
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