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mmc: mxs-mmc: Check the return value from stmp_reset_block() 

stmp_reset_block() may fail, so let's check its return value and
propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Fabio Estevam 2013-07-03 17:02:38 -03:00 committed by Chris Ball
parent a5adbffda8
commit 02c18c4737
1 changed files with 11 additions and 3 deletions
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14
drivers/mmc/host/mxs-mmc.c
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@ -102,12 +102,15 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
BM_SSP_STATUS_CARD_DETECT) ^ host->cd_inverted;
}
static void mxs_mmc_reset(struct mxs_mmc_host *host)
static int mxs_mmc_reset(struct mxs_mmc_host *host)
{
struct mxs_ssp *ssp = &host->ssp;
u32 ctrl0, ctrl1;
int ret;
stmp_reset_block(ssp->base);
ret = stmp_reset_block(ssp->base);
if (ret)
return ret;
ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
@ -132,6 +135,7 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)
writel(ctrl0, ssp->base + HW_SSP_CTRL0);
writel(ctrl1, ssp->base + HW_SSP_CTRL1(ssp));
return 0;
}
static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
@ -625,7 +629,11 @@ static int mxs_mmc_probe(struct platform_device *pdev)
}
clk_prepare_enable(ssp->clk);
mxs_mmc_reset(host);
ret = mxs_mmc_reset(host);
if (ret) {
dev_err(&pdev->dev, "Failed to reset mmc: %d\n", ret);
goto out_clk_disable;
}
ssp->dmach = dma_request_slave_channel(&pdev->dev, "rx-tx");
if (!ssp->dmach) {