[PATCH] mmc:sdhci: Wait longer for command with busy flags

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



When command with busy flags send and also data busy end interrupt
will be generate, the command will be finished when data transfer
complete or data busy state end, Sometimes this will expend more than
10*Hz time to finish this command, so we should wait longer to detect
command complete timeout err.

Signed-off-by: Haijun Zhang <Haijun.Zhang@xxxxxxxxxxxxx>
---
 drivers/mmc/host/sdhci.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index a78bd4f..7b89ed6 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -986,6 +986,7 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 	int flags;
 	u32 mask;
 	unsigned long timeout;
+	u32 timer = 10;
 
 	WARN_ON(host->cmd);
 
@@ -1014,6 +1015,17 @@ static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 		mdelay(1);
 	}
 
+	/*
+	 * When send a commmand with busy state and also the data busy end
+	 * interrupt can be generate, the command will be finished when date
+	 * transfer complete or busy state end. Sometimes this will expend
+	 * more than 10*HZ, In this case whe should wait longer to detect
+	 * command complete timeout err.
+	 */
+	if ((host->cmd->flags & MMC_RSP_BUSY) &&
+			!(host->quirks & SDHCI_QUIRK_NO_BUSY_IRQ))
+		timer = 1000;
+
 	mod_timer(&host->timer, jiffies + 10 * HZ);
 
 	host->cmd = cmd;
-- 
1.8.0


--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux