The patch titled
IB/ipath: fixes a bug where our delay for EEPROM no longer works due to compiler reordering
has been removed from the -mm tree. Its filename is
ib-ipath-fixes-a-bug-where-our-delay-for-eeprom-no.patch
This patch was dropped because I don't have a dog in this fight
------------------------------------------------------
Subject: IB/ipath: fixes a bug where our delay for EEPROM no longer works due to compiler reordering
From: "Bryan O'Sullivan" <bos@xxxxxxxxxxxxx>
The mb() prevents the compiler from reordering on this function, with some
versions of gcc and -Os optimization. The result is random failures in the
EEPROM read without this change.
Signed-off-by: Dave Olson <dave.olson@xxxxxxxxxx>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@xxxxxxxxxx>
Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxxxxxx>
Cc: Roland Dreier <rolandd@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/infiniband/hw/ipath/ipath_eeprom.c | 1 +
1 file changed, 1 insertion(+)
diff -puN drivers/infiniband/hw/ipath/ipath_eeprom.c~ib-ipath-fixes-a-bug-where-our-delay-for-eeprom-no drivers/infiniband/hw/ipath/ipath_eeprom.c
--- a/drivers/infiniband/hw/ipath/ipath_eeprom.c~ib-ipath-fixes-a-bug-where-our-delay-for-eeprom-no
+++ a/drivers/infiniband/hw/ipath/ipath_eeprom.c
@@ -186,6 +186,7 @@ bail:
*/
static void i2c_wait_for_writes(struct ipath_devdata *dd)
{
+ mb();
(void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
}
_
Patches currently in -mm which might be from bos@xxxxxxxxxxxxx are
ib-ipath-fixes-a-bug-where-our-delay-for-eeprom-no.patch
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