From 4e6c71788d6bb0e5438fc9211fa6e52dcca01474 Mon Sep 17 00:00:00 2001 From: Gwendal Grignou Date: Fri, 1 Apr 2016 16:04:22 -0700 Subject: mmc: core: Do regular power cycle when lacking eMMC HW reset support The eMMC HW reset may be implemented either via the host ops ->hw_reset() callback or through DT and the eMMC pwrseq. Additionally some eMMC cards don't support HW reset. To allow a reset to be done for the different combinations of mmc hosts and eMMC/MMC cards, let's implement a fallback via trying a regular power cycle. This improves the mmc block layer retry mechanism of failing I/O requests. Signed-off-by: Gwendal Grignou [Ulf: Rewrote changelog] Signed-off-by: Ulf Hansson --- drivers/mmc/core/core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/mmc/core/core.c') diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index f80b3ab3266a..99275e40bf2f 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -2456,8 +2456,9 @@ int mmc_hw_reset(struct mmc_host *host) ret = host->bus_ops->reset(host); mmc_bus_put(host); - if (ret != -EOPNOTSUPP) - pr_warn("%s: tried to reset card\n", mmc_hostname(host)); + if (ret) + pr_warn("%s: tried to reset card, got error %d\n", + mmc_hostname(host), ret); return ret; } -- cgit v1.2.3