U-Boot timeout on sata load but no error detected

dirkweber — Wed, 25 Jul 2018 07:55:27 GMT

Hi,

I am facing a strange problem when loading a small file (less thaqn 512 bytes) from a SATA disk using U-Boot:

The transfer times out but the load will succeed eventually. The same problem happens when loading files of any size that have the last block non-contiguous.

When stepping through the U-Boot sources that behavior is easy to explain:

The FAT FS will first load any number of blocks of a cluster (including no blocks!) and than load the last 512 bytes for the remaining data. The fsl_sata.c does not care about sata_read() with blkcnt==0 and will therefor timeout (the disk will not send a complete when there is no data to transfer).

While this problem is easy to fix I wonder why this issue I haven't been reported anywhere yet...

...or is there any mistake on my side??

Cheers,

Dirk

Re: U-Boot timeout on sata load but no error detected

yipingwang — Fri, 10 Aug 2018 10:10:44 GMT

Hello Dirk Weber ,

Previously other customers reported similar issue like this.

In U-Boot file /fs/fat/fat.c, function get_contents() line 365, we think that this original fat.c code can not support under 4096 byte. It's needed to modify the line 359~363 and 390 as support under 4096 byte.

Have a great day,
TIC

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topic Re: U-Boot timeout on sata load but no error detected in T-Series

U-Boot timeout on sata load but no error detected

Re: U-Boot timeout on sata load but no error detected