Re: [PATCH] drivers/scsi/sd.c: fix uninitialized variable in handling medium errors

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Mark Lord wrote:

When scsi_get_sense_info_fld() fails (returns 0), it does NOT update the
value of first_err_block.  But sd_rw_intr() merrily continues to use that
variable regardless, possibly making incorrect decisions about retries and the like.

This patch removes the randomness there, by using the first sector of the
request (SCpnt->request->sector) in such cases, instead of first_err_block.

Note that this bug has been around for a while, and is also present in 2.6.16.xx.
This same patch applies there too.

Cheers
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