From 1a4e74a08788db913486cb9a3dc30984c55e9897 Mon Sep 17 00:00:00 2001 From: Bryan O'Sullivan Date: Thu, 28 Sep 2006 09:00:19 -0700 Subject: [PATCH] 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 Signed-off-by: Roland Dreier --- drivers/infiniband/hw/ipath/ipath_eeprom.c | 1 + 1 file changed, 1 insertion(+) 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) -- 2.34.1