2013/8/9 Zhang Haijun <b42...@freescale.com>: > On 08/09/2013 02:39 PM, Barry Song wrote: >> >> 2013/8/9 Haijun Zhang <haijun.zh...@freescale.com>: >>> >>> 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.zh...@freescale.com> >>> --- >>> changes for V2: >>> - Correct the timer >>> >>> drivers/mmc/host/sdhci.c | 14 +++++++++++++- >>> 1 file changed, 13 insertions(+), 1 deletion(-) >>> >>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c >>> index a78bd4f..8888578 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); >>> >>> @@ -1014,7 +1015,18 @@ static void sdhci_send_command(struct sdhci_host >>> *host, struct mmc_command *cmd) >>> mdelay(1); >>> } >>> >>> - mod_timer(&host->timer, jiffies + 10 * HZ); >>> + /* >>> + * 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 + timer * HZ); >> >> haojun, do you mean we need to wait for 1 minutes and 40 seconds for >> timeout? it seems it is too large for a kernel. > > 1000 * HZ = 1000 * 1 / 250 = 4000ms, about 4s. On my platform.
no. pls note the unit is jiffy not ms. > >> >>> host->cmd = cmd; >>> >>> -- >>> 1.8.0 >>> >> -barry >> > > > -- > Thanks & Regards > > Haijun > > -barry -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
