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authorBryan O'Sullivan <bos@pathscale.com>2006-09-28 09:00:19 -0700
committerRoland Dreier <rolandd@cisco.com>2006-09-28 11:17:05 -0700
commit1a4e74a08788db913486cb9a3dc30984c55e9897 (patch)
tree29a2ca27af6000366c9d9a751629c78632820d4c /drivers/infiniband
parent89d1e09b6a6d844ef327937f41658a426be42501 (diff)
downloadop-kernel-dev-1a4e74a08788db913486cb9a3dc30984c55e9897.zip
op-kernel-dev-1a4e74a08788db913486cb9a3dc30984c55e9897.tar.gz
IB/ipath: Fix EEPROM read when driver is compiled with -Os
The EEPROM is read via programmable I/O pins. When the driver is compiled -Os, the CPU can speculatively read the I/O value before it is valid. This patch fixes the problem. Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/ipath/ipath_eeprom.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/ipath/ipath_eeprom.c b/drivers/infiniband/hw/ipath/ipath_eeprom.c
index c8cfda8..a4019a6 100644
--- a/drivers/infiniband/hw/ipath/ipath_eeprom.c
+++ b/drivers/infiniband/hw/ipath/ipath_eeprom.c
@@ -187,6 +187,7 @@ bail:
static void i2c_wait_for_writes(struct ipath_devdata *dd)
{
(void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch);
+ rmb();
}
static void scl_out(struct ipath_devdata *dd, u8 bit)
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