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imxmmc: fix crash when no platform data is provided 

Don't crash if no platform data is provided.
In this case assume that card is present.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Acked-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Paulius Zaleckas 2008-07-09 16:03:20 +03:00 committed by Pierre Ossman
parent 5fc63dfba8
commit c5d5e9c40f
1 changed files with 9 additions and 2 deletions
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11
drivers/mmc/host/imxmmc.c
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@ -905,7 +905,8 @@ static void imxmci_check_status(unsigned long data)
{
struct imxmci_host *host = (struct imxmci_host *)data;
if( host->pdata->card_present(mmc_dev(host->mmc)) != host->present ) {
if (host->pdata && host->pdata->card_present &&
host->pdata->card_present(mmc_dev(host->mmc)) != host->present) {
host->present ^= 1;
dev_info(mmc_dev(host->mmc), "card %s\n",
host->present ? "inserted" : "removed");
@ -968,6 +969,8 @@ static int imxmci_probe(struct platform_device *pdev)
host->mmc = mmc;
host->dma_allocated = 0;
host->pdata = pdev->dev.platform_data;
if (!host->pdata)
dev_warn(&pdev->dev, "No platform data provided!\n");
spin_lock_init(&host->lock);
host->res = r;
@ -1020,7 +1023,11 @@ static int imxmci_probe(struct platform_device *pdev)
if (ret)
goto out;
host->present = host->pdata->card_present(mmc_dev(mmc));
if (host->pdata && host->pdata->card_present)
host->present = host->pdata->card_present(mmc_dev(mmc));
else /* if there is no way to detect assume that card is present */
host->present = 1;
init_timer(&host->timer);
host->timer.data = (unsigned long)host;
host->timer.function = imxmci_check_status;