[PATCH 3.16 038/125] mmc: mmci: Move all CMD irq handling to mmci_cmd_irq()

Greg Kroah-Hartman
2014-09-03T23:15:40Z

From: Ulf Hansson <ulf.hansson@linaro.org>

commit ad82bfea44835da9633548e2031a1af4a9965c14 upstream.

This patch won't change the behavior of how mmci deals with CMD irqs.
By moving code from mmci_irq() to mmci_cmd_irq(), we getter a better
overview of what going on.

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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/mmc/host/mmci.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)

--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -906,9 +906,17 @@ mmci_cmd_irq(struct mmci_host *host, str
unsigned int status)
{
void __iomem *base = host->base;
- bool sbc = (cmd == host->mrq->sbc);
- bool busy_resp = host->variant->busy_detect &&
- (cmd->flags & MMC_RSP_BUSY);
+ bool sbc, busy_resp;
+
+ if (!cmd)
+ return;
+
+ sbc = (cmd == host->mrq->sbc);
+ busy_resp = host->variant->busy_detect && (cmd->flags & MMC_RSP_BUSY);
+
+ if (!((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|
+ MCI_CMDSENT|MCI_CMDRESPEND)))
+ return;

/* Check if we need to wait for busy completion. */
if (host->busy_status && (status & MCI_ST_CARDBUSY))
@@ -1136,8 +1144,6 @@ static irqreturn_t mmci_irq(int irq, voi
spin_lock(&host->lock);

do {
- struct mmc_command *cmd;
-
status = readl(host->base + MMCISTATUS);

if (host->singleirq) {
@@ -1157,11 +1163,7 @@ static irqreturn_t mmci_irq(int irq, voi

dev_dbg(mmc_dev(host->mmc), "irq0 (data+cmd) %08x\n", status);

- cmd = host->cmd;
- if ((status|host->busy_status) & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT|
- MCI_CMDSENT|MCI_CMDRESPEND) && cmd)
- mmci_cmd_irq(host, cmd, status);
-
+ mmci_cmd_irq(host, host->cmd, status);
mmci_data_irq(host, host->data, status);

/* Don't poll for busy completion in irq context. */