diff options
| author | Ulf Hansson | 2014-06-12 14:42:23 +0200 |
|---|---|---|
| committer | Ulf Hansson | 2014-08-11 10:16:16 +0200 |
| commit | 1cb9da502835dad73dda772b20c1e792f4e71589 (patch) | |
| tree | 58d8d4272975cf1e5dffcef16140bd33435216e6 /drivers/mmc | |
| parent | 3a33a94ce27068c8fef63a4f9ab7cff1210e2a4e (diff) | |
mmc: mmci: Remove redundant check of status for DATA irq
We don't need to verify the content of the status register twice, while
we are about to handle a DATA irq. Instead let's leave all verification
to be handled by mmci_data_irq().
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Tested-by: Kees Cook <keescook@chromium.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Cc: <stable@vger.kernel.org> # v3.15+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 6483c5cc6735..a723ed2883f9 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -888,6 +888,10 @@ static void mmci_data_irq(struct mmci_host *host, struct mmc_data *data, unsigned int status) { + /* Make sure we have data to handle */ + if (!data) + return; + /* First check for errors */ if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| MCI_TXUNDERRUN|MCI_RXOVERRUN)) { @@ -1206,7 +1210,6 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) do { struct mmc_command *cmd; - struct mmc_data *data; status = readl(host->base + MMCISTATUS); @@ -1232,11 +1235,7 @@ static irqreturn_t mmci_irq(int irq, void *dev_id) MCI_CMDSENT|MCI_CMDRESPEND) && cmd) mmci_cmd_irq(host, cmd, status); - data = host->data; - if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_STARTBITERR| - MCI_TXUNDERRUN|MCI_RXOVERRUN|MCI_DATAEND| - MCI_DATABLOCKEND) && data) - mmci_data_irq(host, data, status); + mmci_data_irq(host, host->data, status); /* Don't poll for busy completion in irq context. */ if (host->busy_status) |