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authorBrett Russ <russb@emc.com>2005-03-28 15:10:27 -0500
committerJeff Garzik <jgarzik@pobox.com>2005-05-15 19:00:51 -0400
commitcdcca89e1a90fa9112260bd6384f20fcc4280e21 (patch)
tree303ddceb3a324067c6a18ec00b8643d313eb71e4 /include
parent21b1ed74ee3667dcabcba92e486988ea9119a085 (diff)
downloadop-kernel-dev-cdcca89e1a90fa9112260bd6384f20fcc4280e21.zip
op-kernel-dev-cdcca89e1a90fa9112260bd6384f20fcc4280e21.tar.gz
[PATCH] libata: flush COMRESET set and clear
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 ===================================================================
Diffstat (limited to 'include')
-rw-r--r--include/linux/libata.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 505160a..1f7e203 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -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;
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