[19/19] staging: greybus: sdio: Respect the cmd->busy_timeout from the mmc core

Message ID 20200414161413.3036-20-ulf.hansson@linaro.org
State New
Headers show
Series
  • mmc: Improve host driver's support for R1B responses
Related show

Commit Message

Ulf Hansson April 14, 2020, 4:14 p.m.
Using a fixed 1s timeout for all commands is a bit problematic.

For some commands it means waiting longer than needed for the timeout to
expire, which may not a big issue, but still. For other commands, like for
an erase (CMD38) that uses a R1B response, may require longer timeouts than
1s. In these cases, we may end up treating the command as it failed, while
it just needed some more time to complete successfully.

Fix the problem by respecting the cmd->busy_timeout, which is provided by
the mmc core.

Cc: Rui Miguel Silva <rmfrfs@gmail.com>
Cc: Johan Hovold <johan@kernel.org>
Cc: Alex Elder <elder@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: greybus-dev@lists.linaro.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

---
 drivers/staging/greybus/sdio.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

-- 
2.20.1

Comments

Greg KH April 16, 2020, 10:25 a.m. | #1
On Tue, Apr 14, 2020 at 06:14:13PM +0200, Ulf Hansson wrote:
> Using a fixed 1s timeout for all commands is a bit problematic.
> 
> For some commands it means waiting longer than needed for the timeout to
> expire, which may not a big issue, but still. For other commands, like for
> an erase (CMD38) that uses a R1B response, may require longer timeouts than
> 1s. In these cases, we may end up treating the command as it failed, while
> it just needed some more time to complete successfully.
> 
> Fix the problem by respecting the cmd->busy_timeout, which is provided by
> the mmc core.
> 
> Cc: Rui Miguel Silva <rmfrfs@gmail.com>
> Cc: Johan Hovold <johan@kernel.org>
> Cc: Alex Elder <elder@kernel.org>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: greybus-dev@lists.linaro.org
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Patch

diff --git a/drivers/staging/greybus/sdio.c b/drivers/staging/greybus/sdio.c
index 68c5718be827..c4b16bb5c1a4 100644
--- a/drivers/staging/greybus/sdio.c
+++ b/drivers/staging/greybus/sdio.c
@@ -411,6 +411,7 @@  static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd)
 	struct gb_sdio_command_request request = {0};
 	struct gb_sdio_command_response response;
 	struct mmc_data *data = host->mrq->data;
+	unsigned int timeout_ms;
 	u8 cmd_flags;
 	u8 cmd_type;
 	int i;
@@ -469,9 +470,12 @@  static int gb_sdio_command(struct gb_sdio_host *host, struct mmc_command *cmd)
 		request.data_blksz = cpu_to_le16(data->blksz);
 	}
 
-	ret = gb_operation_sync(host->connection, GB_SDIO_TYPE_COMMAND,
-				&request, sizeof(request), &response,
-				sizeof(response));
+	timeout_ms = cmd->busy_timeout ? cmd->busy_timeout :
+		GB_OPERATION_TIMEOUT_DEFAULT;
+
+	ret = gb_operation_sync_timeout(host->connection, GB_SDIO_TYPE_COMMAND,
+					&request, sizeof(request), &response,
+					sizeof(response), timeout_ms);
 	if (ret < 0)
 		goto out;