S3C6410 SDHCI driver crash
Hi,
I'm currently experiencing an SDHCI bug in 2.6.31 and linux-next, which didn't
seem to appear in 2.6.31-rc8.
This is on a new S3C6410 platform (SmartQ 7, see [1]) and it seems to be consistently happening right after displaying "Loading hardware drivers" (in user-space; Ubuntu-based).
The relevant kernel log lines are:
blk: request botched
kernel BUG at drivers/mmc/host/sdhci.c:298!
This is on 2.6.31-next-20090923, but I've also had this on regular 2.6.31, Ben
Dooks latest tree and linux-next with the ADMA patches applied.
Any ideas?
[1]
http://gitorious.org/mcuelenaere-smartq-kernel/mcuelenaere-smartq-kernel/commits/experimental-2.6.31
Regards,
Maurus Cuelenaere
Quoted 6 lines · Maurus Cuelenaere
Hi,
I'm currently experiencing an SDHCI bug in 2.6.31 and linux-next, which didn't
seem to appear in 2.6.31-rc8.
Quoted 8 lines
This is on a new S3C6410 platform (SmartQ 7, see [1]) and it seems to be consistently happening right after displaying "Loading hardware drivers" (in user-space; Ubuntu-based).
The relevant kernel log lines are:
blk: request botched
kernel BUG atdrivers/mmc/host/sdhci.c:298!
Having a look at the code in mainline, this is being triggered in sdhci_write_block_pio(), by the following code:
296 while (blksize) {
297 if (!sg_miter_next(&host->sg_miter))
298 BUG();
Which suggests that the size of the transfer was bigger than the sg list passed to the transfer, which is worrying as this seems to suggest there is a problem with the PIO code writing insufficient data to the card.
Signature · 4 lines
Ben Q: What's a light-year? A: One-third less calories than a regular year.
Op 24-09-09 21:00, Ben Dooks schreef:
Quoted 9 lines · Maurus Cuelenaere
Quoted 8 lines
Hi,
I'm currently experiencing an SDHCI bug in 2.6.31 and linux-next, which didn't
seem to appear in 2.6.31-rc8.This is on a new S3C6410 platform (SmartQ 7, see [1]) and it seems to be consistently happening right after displaying "Loading hardware
drivers" (in
Quoted 10 lines
Quoted 6 lines
user-space; Ubuntu-based).
The relevant kernel log lines are:
blk: request botched
kernel BUG atdrivers/mmc/host/sdhci.c:298!Having a look at the code in mainline, this is being triggered in
sdhci_write_block_pio(), by the following code:
Quoted 8 lines
296 while (blksize) {
297 if (!sg_miter_next(&host->sg_miter))
298BUG();Which suggests that the size of the transfer was bigger than the sg list passed to the transfer, which is worrying as this seems to suggest there is a problem with the PIO code writing insufficient data to the card.
An update on this: apparently this issue was caused by using the EXT4 driver for loading an EXT3 FS, so it has nothing to do with the SDHCI driver...
Sorry for the false alarm.
I also want to mention that the ADMA patch from kki_ap/linux-2.6-samsung.git seems to be working smoothly here.
Regards,
Maurus Cuelenaere