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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As noted by Mark Lord, the outdated ATA1 spec specifies a 20msec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>
hifive-unleashed-5.1
David S. Miller 2009-12-02 21:58:33 -08:00
parent 8492090542
commit 602da297e2
1 changed files with 2 additions and 2 deletions
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4
include/linux/ide.h
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@ -125,8 +125,8 @@ struct ide_io_ports {
* 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 */