[U-Boot] [PATCH v2] mmc: sdhci: Avoid commands errors by simple timeout adaptation.

[Przemyslaw Marczak <p.marczak@samsung.com>]

Hello Pantelis,

Could you look at this patch, please?

On 10/08/2013 06:12 PM, Przemyslaw Marczak wrote:
> Old command timeout value was too small and it caused I/O errors which
> led to uncompleted read/write/erase operations and filesystem errors.
> Timeout adaptation fixes this issue.
>
> Changes in sdhci_send_command() function:
> - change timeout variable to static
> - increase default command timeout to 100 ms
> - add definition of max command timeout value,
>    which can be redefined in each board config file
> - wait for card ready state for max defined time
>    if it doesn't exceed defined maximum or return COMM_ERR
>
> Once successfully increased timeout value will be used in next function
> call. This fix was tested on Goni, Trats, Trats2 boards by testing UMS
> on MMC storage.
>
> Changes v2:
> - move global variable cmd_timeout into function sdhci_send_command()
> - change condition "==" to ">=" when comparing time with timeout
> - print information about timeout increasing and card busy timeout
>
> Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
> Cc: Pantelis Antoniou <panto@antoniou-consulting.com>

Thank you.


-- 
Przemyslaw Marczak
Samsung R&D Institute Poland
Samsung Electronics
p.marczak at samsung.com