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authorPierre Ossman <drzeus@drzeus.cx>2006-10-04 02:15:39 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-04 07:55:14 -0700
commit5f25a66f6bbac563c94af94f03491b3ae43c40af (patch)
treeb1469a08f016f3cbd2739f138d3dec4f45c408b0 /drivers/mmc
parentf9565129993446e16678cfc4d9c7f3b7e75eecbd (diff)
downloadlinux-5f25a66f6bbac563c94af94f03491b3ae43c40af.tar.bz2
[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>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/sdhci.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 4dab5ec392ea..9ff9231116a6 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -717,6 +717,7 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
} else
sdhci_send_command(host, mrq->cmd);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -753,6 +754,7 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
ctrl &= ~SDHCI_CTRL_4BITBUS;
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -860,6 +862,7 @@ static void sdhci_tasklet_finish(unsigned long param)
sdhci_deactivate_led(host);
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
mmc_request_done(host->mmc, mrq);
@@ -893,6 +896,7 @@ static void sdhci_timeout_timer(unsigned long data)
}
}
+ mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}
@@ -1030,6 +1034,7 @@ static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
result = IRQ_HANDLED;
+ mmiowb();
out:
spin_unlock(&host->lock);
@@ -1095,6 +1100,7 @@ static int sdhci_resume (struct pci_dev *pdev)
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 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
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),