ide: Increase WAIT_DRQ to accomodate some CF cards and SSD drives.
Based upon a patch by Philippe De Muyter, and feedback from Mark
Lord and Robert Hancock.
As noted by Mark Lord, the outdated ATA1 spec specifies a 20msec
timeout for setting DRQ but lots of common devices overshoot this.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index e4135d6..0ec6129 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -125,8 +125,8 @@
* Timeouts for various operations:
*/
enum {
- /* spec allows up to 20ms */
- WAIT_DRQ = HZ / 10, /* 100ms */
+ /* spec allows up to 20ms, but CF cards and SSD drives need more */
+ WAIT_DRQ = 1 * HZ, /* 1s */
/* some laptops are very slow */
WAIT_READY = 5 * HZ, /* 5s */
/* should be less than 3ms (?), if all ATAPI CD is closed at boot */