[Linux-stm32] [PATCH v3 01/10] mmc: mmci: Clear busy_status when starting command

[Linus Walleij]

If we are starting a command which can generate a busy
response, then clear the variable host->busy_status
if the variant is using a ->busy_complete callback.

We are lucky that the member is zero by default and
hopefully always gets cleared in the ->busy_complete
callback even on errors, but it's just fragile so
make sure it is always initialized to zero.

Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
ChangeLog v2->v3:
- Clear host->busy_status no matter if the MMC_RSP_BUSY flag
  is set or not.
- Now we have an if inside an if left, so combine these into
  one singel conditional.
- Resulting re-flow the if-clause.
ChangeLog v1->v2:
- Unconditionally clear host->busy_status if we get a
  busy response.
---
 drivers/mmc/host/mmci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index f2b2e8b0574e..14d639872952 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1238,7 +1238,8 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
 			c |= host->variant->cmdreg_srsp;
 	}
 
-	if (host->variant->busy_timeout && cmd->flags & MMC_RSP_BUSY) {
+	host->busy_status = 0;
+	if ((cmd->flags & MMC_RSP_BUSY) && (host->variant->busy_timeout)) {
 		if (!cmd->busy_timeout)
 			cmd->busy_timeout = 10 * MSEC_PER_SEC;
 

-- 
2.40.1