Messages in this thread |  | | Date | Thu, 15 Feb 2007 14:30:02 +0800 | From | "Conke Hu" <> | Subject | Re: [LIBATA BUG] sr.c: TEST_UNIT_READY error |
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On 2/13/07, Conke Hu <conke.hu@gmail.com> wrote: > On 2/2/07, Conke Hu <conke.hu@amd.com> wrote: > > On Wed, 2007-02-07 at 07:40 -0500, Jeff Garzik wrote: > > > Conke Hu wrote: > > > > Hi, > > > > TEST_UNIT_READY in get_capabilities (drivers/scsi/sr.c line 743, or > > > > see below) always returns error. > > > > > > > > ---------------- code begin ----------------------------- > > > > retries = 0; > > > > do { > > > > memset((void *)cmd, 0, MAX_COMMAND_SIZE); > > > > cmd[0] = TEST_UNIT_READY; > > > > > > > > the_result = scsi_execute_req (cd->device, cmd, DMA_NONE, NULL, > > > > 0, &sshdr, SR_TIMEOUT, > > > > MAX_RETRIES); > > > > > > > > retries++; > > > > } while (retries < 5 && > > > > (!scsi_status_is_good(the_result) || > > > > (scsi_sense_valid(&sshdr) && > > > > sshdr.sense_key == UNIT_ATTENTION))); > > > > ---------------- code end ----------------------------- > > > > > > > > I debugged all kernel versions from 2.6.17 to 2.6.20 on several AMD > > > > and other vendor's PATA/IDE controllers, and I get the_result==0x8000002 > > > > and retries==5; on silicon image 3132, i get the_result=0x2eb. > > > > Does 0x8000002 mean ((DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION)? > > > > what's wrong? > > > > > > What does the sense data returned in the sense buffer say is wrong? > > > > > > Jeff > > > > I dump scsi_sense_hdr as follows: > > sshdr.response_code = 0x70 > > sshdr.sense_key = 0x2 > > sshdr.asc = 0x3a > > sshdr.ascq = 0x1 > > sshdr.additional_length = 0x0 > > > > the sense_key is 0x2 (NOT_READY), but the expected UNIT_ATTENTION :( > but "NOT" the expected UNIT_ATTENTION. > > > > > BTW, I am sorry for a mistake, Sil3132 also returns 0x8000002, not 0x2eb > > as I said in the first mail. In a word, all cases return "the_result" as > > 0x8000002. > > > > > the bytes 0 ~ 13 in sense buffer are: > 70 00 02 00 00 00 00 0a 00 00 00 00 3a > other bytes are all 0x00; > > in fact this issue can be reproduced in any libata driver, either sata or pata. > > Conke >
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