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Subject[PATCH V3 1/3] mmc: mmci: fix read status for busy detect
Date
From: Ludovic Barre <ludovic.barre@st.com>

"busy_detect_flag" is used to read & clear busy value of mmci status.
"busy_detect_mask" is used to manage busy irq of mmci mask.
So to read mmci status the busy_detect_flag must be take account.
if the variant does not support busy detect feature the flag is null
and there is no impact.

Not need to re-read the status register in mmci_cmd_irq, the
status parameter can be used.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 356833a..5b5cc45 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -1240,7 +1240,7 @@ mmci_cmd_irq(struct mmci_host *host, struct mmc_command *cmd,
*/
if (!host->busy_status &&
!(status & (MCI_CMDCRCFAIL|MCI_CMDTIMEOUT)) &&
- (readl(base + MMCISTATUS) & host->variant->busy_detect_flag)) {
+ (status & host->variant->busy_detect_flag)) {

/* Clear the busy start IRQ */
writel(host->variant->busy_detect_mask,
@@ -1517,7 +1517,8 @@ static irqreturn_t mmci_irq(int irq, void *dev_id)
* to make sure that both start and end interrupts are always
* cleared one after the other.
*/
- status &= readl(host->base + MMCIMASK0);
+ status &= readl(host->base + MMCIMASK0) |
+ host->variant->busy_detect_flag;
if (host->variant->busy_detect)
writel(status & ~host->variant->busy_detect_mask,
host->base + MMCICLEAR);
--
2.7.4
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