[U-Boot] Problems around fatwrite command from uboot

[Jean Louis]

Hi,

I confirm that your patch correct my problem and the bug disappear.

The question is : why (or when) the size equals zero ?

Thank you Damien.

----

2013/2/28 Damien HUANG 黄卫 <damienwei at hotmail.com>

> Hi,
> You received this email, because you had recently experienced fatwrite
> issue with uboot.
>
> The symptom of the problem is at the time of calling fatwrite to write a
> block of data to file, the below message would be shown, despite the
> message saying "xxxx bytes written" at the end, however, there was not data
> being actually stored.
>
> >* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear*>* mmc_send_cmd: timedout waiting on cmd inhibit to clear
> *>* 42428 bytes written*
>
>
> After investigation, I believe the problem can be fixed at function
> "set_cluster" within file fat_write.c under directory /fs/fat (patch file
> was attached).
>
> The reason of the issue is: If function "set_cluster" was called with size
> equals ZERO, then the function would only issue the write instruction to
> MMC driver without data, this caused the MMC to be in a wait state for data
> and inhibiting further commands. As all subsequent commands to MMC would
> first check whether MMC is in inhibit state before actual command being
> issued, this check would always fail and time out occur, so the above
> message being displayed.
>
> Cheers,
> Damien
>
> ------------------------------
> From: 1978.jl at gmail.com
> Date: Wed, 27 Feb 2013 09:02:42 +0100
> Subject: Re: [U-Boot] Problems around fatwrite command from uboot
> To: damienwei at hotmail.com
>
> Hi Damien,
>
> I have only patched as I say on :
> http://lists.denx.de/pipermail/u-boot/2013-February/147407.html
>
> I have no more changes for the moment.
>
> Bye.
>
> ----
>
> 2013/2/27 Damien HUANG 黄卫 <damienwei at hotmail.com>
>
> Hi Jean,
> I saw your post in regard to the issue of fatwrite command from uboot. As
> I am also experienced with such an error, I am wonder if you got the
> problem fixed? If so, please share your success.
> Cheers,
> Damien
>
>