AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

ARM: 7464/1: mmc: omap_hsmmc: ensure probe returns error if DMA channel request fails

Browse Source 
If dma_request_channel() fails (e.g. because DMA enine is not built
into the kernel), the return value from probe is zero causing the
driver to be bound to the device even though probe failed.

To fix, ensure that probe returns an error value when a DMA channel
request fail.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Kevin Hilman 2012-07-11 17:51:40 +01:00 committed by Russell King
parent 4e1755bbb4
commit 04e8c7bc2c
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/mmc/host/omap_hsmmc.c
View File

@ -1924,12 +1924,14 @@ static int __devinit omap_hsmmc_probe(struct platform_device *pdev)
host->rx_chan = dma_request_channel(mask, omap_dma_filter_fn, &rx_req);
if (!host->rx_chan) {
dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel %u\n", rx_req);
ret = -ENXIO;
goto err_irq;
}
host->tx_chan = dma_request_channel(mask, omap_dma_filter_fn, &tx_req);
if (!host->tx_chan) {
dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel %u\n", tx_req);
ret = -ENXIO;
goto err_irq;
}