From 9c17d08ca183b92c9cfab6537069914a5e0e7e81 Mon Sep 17 00:00:00 2001 From: Kevin Hilman Date: Tue, 10 Jul 2012 16:40:56 -0700 Subject: [PATCH] mmc: omap_hsmmc: ensure probe returns error upon resource failure If platform_get_resource_by_name() fails, driver probe is aborted an should return an error so the driver is not bound to the device. However, in the current error path of platform_get_resource_by_name(), probe returns zero since the return value (ret) is not properly set. With a zero return value, the driver core assumes probe was successful and will bind the driver to the device. Fix this by ensuring that probe returns an error code in this failure path. Signed-off-by: Kevin Hilman Acked-by: Venkatraman S Signed-off-by: Chris Ball --- drivers/mmc/host/omap_hsmmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index a9227a7a9d69..bc28627af66b 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -1931,6 +1931,7 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev) res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); if (!res) { dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); + ret = -ENXIO; goto err_irq; } host->dma_line_tx = res->start; @@ -1938,6 +1939,7 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev) res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); if (!res) { dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); + ret = -ENXIO; goto err_irq; } host->dma_line_rx = res->start; -- 2.20.1