xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] libata: flush COMRESET set and clear

Browse Source 
Updated patch to fix erroneous flush of COMRESET set and missing flush
of COMRESET clear.  Created a new routine scr_write_flush() to try to
prevent this in the future.  Also, this patch is based on libata-2.6
instead of the previous libata-dev-2.6 based patch.

Signed-off-by: Brett Russ <russb@emc.com>

Index: libata-2.6/drivers/scsi/libata-core.c
===================================================================
This commit is contained in:
Brett Russ
2005-03-28 15:10:27 -05:00
committed by Jeff Garzik
parent 21b1ed74ee
commit cdcca89e1a
2 changed files with 10 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
include/linux/libata.h
View File

@@ -584,6 +584,13 @@ static inline void scr_write(struct ata_port *ap, unsigned int reg, u32 val)
ap->ops->scr_write(ap, reg, val);
}
static inline void scr_write_flush(struct ata_port *ap, unsigned int reg,
u32 val)
{
ap->ops->scr_write(ap, reg, val);
(void) ap->ops->scr_read(ap, reg);
}
static inline unsigned int sata_dev_present(struct ata_port *ap)
{
return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0;