Messages in this thread Patch in this message |  | | From | Neal Buckendahl <> | Subject | [PATCH] mmc: host: sdhci: prevent mmcqd from becoming locked on mmc timeout | Date | Wed, 13 Nov 2013 20:22:54 -0800 |
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fixed a condition where device issues a status cmd to sdcard but no response comes from sdcard. The sdhci irq fires and we hit a timeout case which calls sdhci_finish_data(). sdhci_finish_data eventually attempt to reset controller and issues stop cmd. However mmcdq is wait_for_completion(&mrq->completion) in function mmc_wait_for_req_done which never occurs.
Signed-off-by: Neal Buckendahl <nealb001@gmail.com> Signed-off-by: Narayanan Gopalakrishnan <narayan.1979@gmail.com> Signed-off-by: Philip Rakity <prakity@nvidia.com> --- drivers/mmc/host/sdhci.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 6785fb1..21620d2 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -973,6 +973,11 @@ static void sdhci_finish_data(struct sdhci_host *host) if (data->error) { sdhci_reset(host, SDHCI_RESET_CMD); sdhci_reset(host, SDHCI_RESET_DATA); + if (data->error == -ETIMEDOUT) { + host->mrq->cmd->error = -ETIMEDOUT; + tasklet_schedule(&host->finish_tasklet); + WARN_ON(1); + } } sdhci_send_command(host, data->stop); -- 1.7.10.4
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