ARM: MXC: mxcmmc: misc cleanups

Be more verbose on error messages and add one debug message.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Volker Ernst <volker.ernst@txtr.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Michał Mirosław <mirqus@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 2df9041..44a53ee 100644 (file)
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -151,6 +151,8 @@ static void mxcmci_softreset(struct mxcmci_host *host)
 {
        int i;
 
+       dev_dbg(mmc_dev(host->mmc), "mxcmci_softreset\n");
+
        /* reset sequence */
        writew(STR_STP_CLK_RESET, host->base + MMC_REG_STR_STP_CLK);
        writew(STR_STP_CLK_RESET | STR_STP_CLK_START_CLK,
@@ -290,16 +292,25 @@ static int mxcmci_finish_data(struct mxcmci_host *host, unsigned int stat)
                dev_dbg(mmc_dev(host->mmc), "request failed. status: 0x%08x\n",
                                stat);
                if (stat & STATUS_CRC_READ_ERR) {
+                       dev_err(mmc_dev(host->mmc), "%s: -EILSEQ\n", __func__);
                        data->error = -EILSEQ;
                } else if (stat & STATUS_CRC_WRITE_ERR) {
                        u32 err_code = (stat >> 9) & 0x3;
-                       if (err_code == 2) /* No CRC response */
+                       if (err_code == 2) { /* No CRC response */
+                               dev_err(mmc_dev(host->mmc),
+                                       "%s: No CRC -ETIMEDOUT\n", __func__);
                                data->error = -ETIMEDOUT;
-                       else
+                       } else {
+                               dev_err(mmc_dev(host->mmc),
+                                       "%s: -EILSEQ\n", __func__);
                                data->error = -EILSEQ;
+                       }
                } else if (stat & STATUS_TIME_OUT_READ) {
+                       dev_err(mmc_dev(host->mmc),
+                               "%s: read -ETIMEDOUT\n", __func__);
                        data->error = -ETIMEDOUT;
                } else {
+                       dev_err(mmc_dev(host->mmc), "%s: -EIO\n", __func__);
                        data->error = -EIO;
                }
        } else {
@@ -433,8 +444,6 @@ static int mxcmci_transfer_data(struct mxcmci_host *host)
        struct scatterlist *sg;
        int stat, i;
 
-       host->datasize = 0;
-
        host->data = data;
        host->datasize = 0;