4.9-stable review patch. If anyone has any objections, please let me know.
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From: Ulf Hansson ulf.hansson@linaro.org
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
--- drivers/mmc/core/mmc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1719,9 +1719,11 @@ static int mmc_init_card(struct mmc_host 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; + } }
/*