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Commit 1a4e74a0 authored by Bryan O'Sullivan's avatar Bryan O'Sullivan Committed by Roland Dreier
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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: default avatarBryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 89d1e09b

drivers/infiniband/hw/ipath/ipath_eeprom.c

+1 −0
Original line number Diff line number Diff line
@@ -187,6 +187,7 @@ static int i2c_gpio_get(struct ipath_devdata *dd, 
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)