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IB/ipath: Fix EEPROM read when driver is compiled with -Os

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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>
This commit is contained in:
Bryan O'Sullivan 2006-09-28 09:00:19 -07:00 committed by Roland Dreier
parent 89d1e09b6a
commit 1a4e74a087
1 changed files with 1 additions and 0 deletions
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1
drivers/infiniband/hw/ipath/ipath_eeprom.c
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@ -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)