mxcmmc: fix error path in mxcmci_probe

After a failing allocation of mmc or a failed ioremap in mxcmci_probe host was
used uninitialized.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Martin Fuzzey <mfuzzey@gmail.com>
Cc: Pierre Ossman <drzeus@drzeus.cx>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 8867152..60a2b69 100644 (file)
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -679,17 +679,17 @@ static int mxcmci_probe(struct platform_device *pdev)
 {
        struct mmc_host *mmc;
        struct mxcmci_host *host = NULL;
-       struct resource *r;
+       struct resource *iores, *r;
        int ret = 0, irq;
 
        printk(KERN_INFO "i.MX SDHC driver\n");
 
-       r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        irq = platform_get_irq(pdev, 0);
-       if (!r || irq < 0)
+       if (!iores || irq < 0)
                return -EINVAL;
 
-       r = request_mem_region(r->start, resource_size(r), pdev->name);
+       r = request_mem_region(iores->start, resource_size(iores), pdev->name);
        if (!r)
                return -EBUSY;
 
@@ -809,7 +809,7 @@ out_iounmap:
 out_free:
        mmc_free_host(mmc);
 out_release_mem:
-       release_mem_region(host->res->start, resource_size(host->res));
+       release_mem_region(iores->start, resource_size(iores));
        return ret;
 }