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[MMC] sdhci: check SDHCI base clock 

A base clock value of 0 means that the driver must get the base clock through
some other means.  As we have no other way of getting it, we must abort.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Pierre Ossman 2006-06-30 02:22:21 -07:00 committed by Russell King
parent d63fb6c55f
commit 8ef1a14379
1 changed files with 11 additions and 4 deletions
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15
drivers/mmc/sdhci.c
View File

@ -1030,7 +1030,14 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
else /* XXX: Hack to get MMC layer to avoid highmem */
pdev->dma_mask = 0;
host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
host->max_clk =
(caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
if (host->max_clk == 0) {
printk(KERN_ERR "%s: Hardware doesn't specify base clock "
"frequency.\n", host->slot_descr);
ret = -ENODEV;
goto unmap;
}
host->max_clk *= 1000000;
/*
@ -1078,7 +1085,7 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
host->slot_descr, host);
if (ret)
goto unmap;
goto untasklet;
sdhci_init(host);
@ -1097,10 +1104,10 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
return 0;
unmap:
untasklet:
tasklet_kill(&host->card_tasklet);
tasklet_kill(&host->finish_tasklet);
unmap:
iounmap(host->ioaddr);
release:
pci_release_region(pdev, host->bar);