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-rw-r--r--drivers/mmc/core/core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 681b089f669a..2d415cb1889a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -51,6 +51,7 @@
/* The max erase timeout, used when host->max_busy_timeout isn't specified */
#define MMC_ERASE_TIMEOUT_MS (60 * 1000) /* 60 s */
+#define SD_DISCARD_TIMEOUT_MS (250)
static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };
@@ -1619,6 +1620,12 @@ static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
{
unsigned int erase_timeout;
+ /* for DISCARD none of the below calculation applies.
+ * the busy timeout is 250msec per discard command.
+ */
+ if (arg == SD_DISCARD_ARG)
+ return SD_DISCARD_TIMEOUT_MS;
+
if (card->ssr.erase_timeout) {
/* Erase timeout specified in SD Status Register (SSR) */
erase_timeout = card->ssr.erase_timeout * qty +