mmc: core: Reset HPI enabled state during re-init and in case of errors

commit a0741ba40a009f97c019ae7541dc61c1fdf41efb upstream.

During a re-initialization of the eMMC card, we may fail to re-enable HPI.
In these cases, that isn't properly reflected in the card->ext_csd.hpi_en
bit, as it keeps being set. This may cause following attempts to use HPI,
even if's not enabled. Let's fix this!

Fixes: eb0d8f135b67 ("mmc: core: support HPI send command")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index bad5c1b..914ea8d 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1755,9 +1755,11 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
                if (err) {
                        pr_warn("%s: Enabling HPI failed\n",
                                mmc_hostname(card->host));
+                       card->ext_csd.hpi_en = 0;
                        err = 0;
-               } else
+               } else {
                        card->ext_csd.hpi_en = 1;
+               }
        }
 
        /*