Errors are reported through printk. In the upstream kernel this is the spot where an error would be detected and reported for a bad sd_resume:
drivers/scsi/sd.c:3061
if (res) {
sd_printk(KERN_WARNING, sdkp, "START_STOP FAILED\n");
sd_print_result(sdkp, res);
if (driver_byte(res) & DRIVER_SENSE)
sd_print_sense_hdr(sdkp, &sshdr);
}
So it would print out the device id with a message that the start_stop failed, and then optionally print out the sense buffer if it was supplied.
Todd Brandt
Linux Kernel Developer OTC, Hillsboro OR
https://opensource.intel.com/linux-wiki/ToddBrandt
________________________________________
From: Oliver Neukum [oneukum@xxxxxxx]
Sent: Friday, August 02, 2013 10:05 AM
To: Brandt, Todd E
Cc: linux-ide@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx
Subject: Re: [PATCH] Hard disk S3 resume time optimization
On Fri, 2013-08-02 at 16:41 +0000, Brandt, Todd E wrote:
> Do you mean in terms of debug after a failure? I can resubmit the patch with the scsi_sense_hdr buffer still in place. I just wanted to keep the first draft simple to get the concept across.
How are errors reported?
Regards
Oliver
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