diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-09-28 09:00:19 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-09-28 11:17:05 -0700 |
| commit | 1a4e74a08788db913486cb9a3dc30984c55e9897 (patch) | |
| tree | 29a2ca27af6000366c9d9a751629c78632820d4c /drivers/infiniband/hw/ipath/ipath_eeprom.c | |
| parent | 89d1e09b6a6d844ef327937f41658a426be42501 (diff) | |
| download | talos-obmc-linux-1a4e74a08788db913486cb9a3dc30984c55e9897.tar.gz talos-obmc-linux-1a4e74a08788db913486cb9a3dc30984c55e9897.zip | |
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/hw/ipath/ipath_eeprom.c')
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_eeprom.c | 1 |
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 c8cfda89cb36..a4019a6b7560 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) |
