diff mbox series

[V2,2/6] mmc: cqhci: Increase recovery halt timeout

Message ID 20231103084720.6886-3-adrian.hunter@intel.com
State New
Headers
Series mmc: block: Fixes for CQE error recovery recovery |

Commit Message

Adrian Hunter Nov. 3, 2023, 8:47 a.m. UTC 
  Failing to halt complicates the recovery. Additionally, unless the card or
controller are stuck, which is expected to be very rare, then the halt
should succeed, so it is better to wait. Set a large timeout.

Fixes: a4080225f51d ("mmc: cqhci: support for command queue enabled host")
Cc: stable@vger.kernel.org
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 drivers/mmc/host/cqhci-core.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Adrian Hunter Nov. 6, 2023, 6:57 a.m. UTC | #1 
On 3/11/23 12:37, Avri Altman wrote:
>> Failing to halt complicates the recovery. Additionally, unless the card or
>> controller are stuck, which is expected to be very rare, then the halt should
>> succeed, so it is better to wait. Set a large timeout.
> Maybe also explain that If task queuing is in progress, CQE needs to complete the operation, sending both commands and processing the responses.

True, although those commands should be quite quick.

> 
>>
>> Fixes: a4080225f51d ("mmc: cqhci: support for command queue enabled
>> host")
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> Reviewed-by: Avri Altman <avri.altman@wdc.com>
> 
>> ---
>>  drivers/mmc/host/cqhci-core.c | 6 +++---
>>  1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
>> index b3d7d6d8d654..15f5a069af1f 100644
>> --- a/drivers/mmc/host/cqhci-core.c
>> +++ b/drivers/mmc/host/cqhci-core.c
>> @@ -984,10 +984,10 @@ static bool cqhci_halt(struct mmc_host *mmc,
>> unsigned int timeout)
>>  /*
>>   * After halting we expect to be able to use the command line. We interpret
>> the
>>   * failure to halt to mean the data lines might still be in use (and the upper
>> - * layers will need to send a STOP command), so we set the timeout based
>> on a
>> - * generous command timeout.
>> + * layers will need to send a STOP command), however failing to halt
>> + complicates
>> + * the recovery, so set a timeout that would reasonably allow I/O to
>> complete.
>>   */
>> -#define CQHCI_START_HALT_TIMEOUT       5
>> +#define CQHCI_START_HALT_TIMEOUT       500
>>
>>  static void cqhci_recovery_start(struct mmc_host *mmc)  {
>> --
>> 2.34.1
>
diff mbox series

Patch

diff --git a/drivers/mmc/host/cqhci-core.c b/drivers/mmc/host/cqhci-core.c
index b3d7d6d8d654..15f5a069af1f 100644
--- a/drivers/mmc/host/cqhci-core.c
+++ b/drivers/mmc/host/cqhci-core.c
@@ -984,10 +984,10 @@  static bool cqhci_halt(struct mmc_host *mmc, unsigned int timeout)
 /*
  * After halting we expect to be able to use the command line. We interpret the
  * failure to halt to mean the data lines might still be in use (and the upper
- * layers will need to send a STOP command), so we set the timeout based on a
- * generous command timeout.
+ * layers will need to send a STOP command), however failing to halt complicates
+ * the recovery, so set a timeout that would reasonably allow I/O to complete.
  */
-#define CQHCI_START_HALT_TIMEOUT	5
+#define CQHCI_START_HALT_TIMEOUT	500
 
 static void cqhci_recovery_start(struct mmc_host *mmc)
 {