Hi, Pradu.
Sorry for late.
I will wait for your next version than i will check yours.
To Ulf.
Thanks for review!
Best Regards,
Jaehoon Chung
On 05/22/2015 10:21 PM, Ulf Hansson wrote:
> On 18 May 2015 at 16:23, Prabu Thangamuthu <Prabu.T@xxxxxxxxxxxx> wrote:
>> Removing dw_mmc driver immediately after inserting the dw_mmc driver is
>
> I guess it hangs even if you remove it after a couple of days? :-)
>
> Perhaps makes this a bit more clear?
>
>> getting hung for eMMC device. Root cause for this issue is, dw_mci_remove
>> will disable all the interrupts then it will call dw_mci_cleanup_slot.
>> dw_mci_cleanup_slot is issuing CMD6 to disable boot partition access and
>> it's waiting for command complete interrupt. Since INTMASK was already
>> cleared by dw_mci_remove, command complete interrupt is not reaching
>> the system. This leads to process hung.
>
> /s dw_mci_remove / dw_mci_remove()
>
>>
>> Signed-off-by: Prabu Thangamuthu <prabu.t@xxxxxxxxxxxx>
>
> This patch looks good overall, but please send a new version with
> updated changelog. Moreover, please use "mmc: dw_mmc:" as prefix for
> the commit message header.
>
> Kind regards
> Uffe
>
>> ---
>> drivers/mmc/host/dw_mmc.c | 6 +++---
>> 1 files changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
>> index 5f5adaf..f0a0aff 100644
>> --- a/drivers/mmc/host/dw_mmc.c
>> +++ b/drivers/mmc/host/dw_mmc.c
>> @@ -2941,15 +2941,15 @@ void dw_mci_remove(struct dw_mci *host)
>> {
>> int i;
>>
>> - mci_writel(host, RINTSTS, 0xFFFFFFFF);
>> - mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
>> -
>> for (i = 0; i < host->num_slots; i++) {
>> dev_dbg(host->dev, "remove slot %d\n", i);
>> if (host->slot[i])
>> dw_mci_cleanup_slot(host->slot[i], i);
>> }
>>
>> + mci_writel(host, RINTSTS, 0xFFFFFFFF);
>> + mci_writel(host, INTMASK, 0); /* disable all mmc interrupt first */
>> +
>> /* disable clock to CIU */
>> mci_writel(host, CLKENA, 0);
>> mci_writel(host, CLKSRC, 0);
>> --
>> 1.7.6.5
>
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