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authorTejun Heo <htejun@gmail.com>2007-02-02 15:29:27 +0900
committerJeff Garzik <jeff@garzik.org>2007-02-09 17:39:38 -0500
commit34fee227dd13af593be599b19683464ac4dd4c8b (patch)
tree2c246bdc4e573fef2df2c67b83d6b3f43c63503e /drivers/ata
parent3f64f565bebbb4a1a4e9ccce5565c9f86458ddb1 (diff)
libata: add 150ms between completion of hardreset and status checking
Follow the old SRST rule and delay 150ms between completion of hardreset and status checking. Debouncing delay should usually cover this but debounce duration could be shorter than 150ms under certain circumstances. Usefulness depends on host controller implementation but it can't hurt and serves as a reminder that 2s delay for GoVault should also be added here. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 5c2e581bf990..6a2083a6d175 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3023,6 +3023,9 @@ int sata_std_hardreset(struct ata_port *ap, unsigned int *class)
return 0;
}
+ /* wait a while before checking status, see SRST for more info */
+ msleep(150);
+
if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
ata_port_printk(ap, KERN_ERR,
"COMRESET failed (device not ready)\n");