[MXS MMC 4/5] Check the return codes of clk_enable() and mxs_reset_block()

Lothar Waßmann
2011-12-06T13:41:29Z

Add an int return value to mxs_mmc_reset(), so that the return code of
mxs_reset_block() can be promoted to the caller.
Also check the return code of clk_enable() in the probe function.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
---
drivers/mmc/host/mxs-mmc.c | 26 +++++++++++++++++++++-----
1 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index a9b70d2..0003d03 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -185,11 +185,14 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
BM_SSP_STATUS_CARD_DETECT);
}

-static void mxs_mmc_reset(struct mxs_mmc_host *host)
+static int mxs_mmc_reset(struct mxs_mmc_host *host)
{
+ int ret;
u32 ctrl0, ctrl1;

- mxs_reset_block(host->base);
+ ret = mxs_reset_block(host->base);
+ if (ret)
+ return ret;

ctrl0 = BM_SSP_CTRL0_IGNORE_CRC;
ctrl1 = BF_SSP(0x3, CTRL1_SSP_MODE) |
@@ -214,6 +217,7 @@ static void mxs_mmc_reset(struct mxs_mmc_host *host)

writel(ctrl0, host->base + HW_SSP_CTRL0);
writel(ctrl1, host->base + HW_SSP_CTRL1);
+ return 0;
}

static void mxs_mmc_start_cmd(struct mxs_mmc_host *host,
@@ -712,9 +716,19 @@ static int mxs_mmc_probe(struct platform_device *pdev)
ret = PTR_ERR(host->clk);
goto out_iounmap;
}
- clk_enable(host->clk);
+ ret = clk_enable(host->clk);
+ if (ret) {
+ dev_err(mmc_dev(host->mmc),
+ "%s: failed to enable clock: %d\n", __func__, ret);
+ goto out_clk_put;
+ }

- mxs_mmc_reset(host);
+ ret = mxs_mmc_reset(host);
+ if (ret) {
+ dev_err(mmc_dev(host->mmc),
+ "%s: failed to reset controller: %d\n", __func__, ret);
+ goto out_clk_put;
+ }

dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
@@ -829,7 +843,9 @@ static int mxs_mmc_resume(struct device *dev)
struct mxs_mmc_host *host = mmc_priv(mmc);
int ret = 0;

- clk_enable(host->clk);
+ ret = clk_enable(host->clk);
+ if (ret)
+ return ret;

ret = mmc_resume_host(mmc);

--
1.5.6.5