ide: Increase WAIT_DRQ to accomodate some CF cards and SSD drives. (602da297) · Commits · 戴 / test

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 As noted by Mark Lord, the outdated ATA1 spec specifies a 20msec timeout for setting DRQ but lots of common devices overshoot this.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>

include/linux/ide.h

+2 −2

Original line number	Original line	Diff line number	Diff line
	@@ -125,8 +125,8 @@ struct ide_io_ports {
	* Timeouts for various operations:		* Timeouts for various operations:
	*/		*/
	enum {		enum {
	/* spec allows up to 20ms */		/* spec allows up to 20ms, but CF cards and SSD drives need more */
	WAIT_DRQ = HZ / 10, /* 100ms */		WAIT_DRQ = 1 * HZ, /* 1s */
	/* some laptops are very slow */		/* some laptops are very slow */
	WAIT_READY = 5 * HZ, /* 5s */		WAIT_READY = 5 * HZ, /* 5s */
	/* should be less than 3ms (?), if all ATAPI CD is closed at boot */		/* should be less than 3ms (?), if all ATAPI CD is closed at boot */

Admin message