diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-11-02 16:49:09 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-11-07 15:26:42 +0300 |
| commit | 69b962a65a547690a356f9f76bc4f53db538ac49 (patch) | |
| tree | 36862b7af64200f3e9a43c887f7d9afa7ee17b25 /drivers | |
| parent | 6ebebeab5185f50d55c6a24d0abe47e5dac1b191 (diff) | |
| download | linux-69b962a65a547690a356f9f76bc4f53db538ac49.tar.xz | |
mmc: sdhci: Fix unexpected data interrupt handling
In the busy response case (i.e. !host->data), an unexpected data interrupt
would result in clearing the data command as though it had completed but
without informing the upper layers and thus resulting in a hang. Fix by
only clearing the data command for data interrupts that are expected.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index fd0f24cddad4..0dd3c31e23bb 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2521,9 +2521,6 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) if (!host->data) { struct mmc_command *data_cmd = host->data_cmd; - if (data_cmd) - host->data_cmd = NULL; - /* * The "data complete" interrupt is also used to * indicate that a busy state has ended. See comment @@ -2531,11 +2528,13 @@ static void sdhci_data_irq(struct sdhci_host *host, u32 intmask) */ if (data_cmd && (data_cmd->flags & MMC_RSP_BUSY)) { if (intmask & SDHCI_INT_DATA_TIMEOUT) { + host->data_cmd = NULL; data_cmd->error = -ETIMEDOUT; sdhci_finish_mrq(host, data_cmd->mrq); return; } if (intmask & SDHCI_INT_DATA_END) { + host->data_cmd = NULL; /* * Some cards handle busy-end interrupt * before the command completed, so make |