mmc: core: Revert "skip card initialization if power class selection fails"

This reverts commit 3d93576e(skip card initialization if
power class selection fails).
Problem has been reported when this is used with eMMC4.41
card with Tegra Platform. Till the issue is root caused,
bus width selection failure should not be treated as fatal.

Reported-by: Marc Dietrich <marvin24@gmx.de>
Signed-Off-by: Venkatraman S <svenkatr@ti.com>
CC: Ulf Hansson <ulf.hansson@stericsson.com>
CC: Subhash Jadavani <subhashj@codeaurora.org>
CC: Saugata Das <saugata.das@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 258b203397aa88a381a9e4f007eacf77b9452aa3..4f4489aa6baede795ae21c222e0aa9e99e7b5800 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -717,10 +717,6 @@ static int mmc_select_powerclass(struct mmc_card *card,
                                 card->ext_csd.generic_cmd6_time);
        }
 
-       if (err)
-               pr_err("%s: power class selection for ext_csd_bus_width %d"
-                      " failed\n", mmc_hostname(card->host), bus_width);
-
        return err;
 }
 
@@ -1104,7 +1100,9 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
                                EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
                err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
                if (err)
-                       goto err;
+                       pr_warning("%s: power class selection to bus width %d"
+                                  " failed\n", mmc_hostname(card->host),
+                                  1 << bus_width);
        }
 
        /*
@@ -1136,7 +1134,10 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
                        err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
                                                    ext_csd);
                        if (err)
-                               goto err;
+                               pr_warning("%s: power class selection to "
+                                          "bus width %d failed\n",
+                                          mmc_hostname(card->host),
+                                          1 << bus_width);
 
                        err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
                                         EXT_CSD_BUS_WIDTH,
@@ -1164,7 +1165,10 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
                        err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
                                                    ext_csd);
                        if (err)
-                               goto err;
+                               pr_warning("%s: power class selection to "
+                                          "bus width %d ddr %d failed\n",
+                                          mmc_hostname(card->host),
+                                          1 << bus_width, ddr);
 
                        err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
                                         EXT_CSD_BUS_WIDTH,