diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-09-28 12:00:19 -0400 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2006-09-28 14:17:05 -0400 |
| commit | 1a4e74a08788db913486cb9a3dc30984c55e9897 (patch) | |
| tree | 29a2ca27af6000366c9d9a751629c78632820d4c /drivers | |
| parent | 89d1e09b6a6d844ef327937f41658a426be42501 (diff) | |
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')
| -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: | |||
| 187 | static void i2c_wait_for_writes(struct ipath_devdata *dd) | 187 | static void i2c_wait_for_writes(struct ipath_devdata *dd) |
| 188 | { | 188 | { |
| 189 | (void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); | 189 | (void)ipath_read_kreg32(dd, dd->ipath_kregs->kr_scratch); |
| 190 | rmb(); | ||
| 190 | } | 191 | } |
| 191 | 192 | ||
| 192 | static void scl_out(struct ipath_devdata *dd, u8 bit) | 193 | static void scl_out(struct ipath_devdata *dd, u8 bit) |