[PATCH] mmc: fix MMIO vs memory races in sdhci
Sprinkle some mmiowb() where needed (writeX() before unlock()).
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 4dab5ec..9ff9231 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -717,6 +717,7 @@
} else
sdhci_send_command(host, mrq->cmd);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -753,6 +754,7 @@
ctrl &= ~SDHCI_CTRL_4BITBUS;
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -860,6 +862,7 @@
sdhci_deactivate_led(host);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(host->mmc, mrq);
@@ -893,6 +896,7 @@
}
}
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -1030,6 +1034,7 @@
result = IRQ_HANDLED;
+ mmiowb();
out:
spin_unlock(&host->lock);
@@ -1095,6 +1100,7 @@
if (chip->hosts[i]->flags & SDHCI_USE_DMA)
pci_set_master(pdev);
sdhci_init(chip->hosts[i]);
+ mmiowb();
ret = mmc_resume_host(chip->hosts[i]->mmc);
if (ret)
return ret;
@@ -1327,6 +1333,8 @@
host->chip = chip;
chip->hosts[slot] = host;
+ mmiowb();
+
mmc_add_host(mmc);
printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),