[PATCH] aic7xxx reset loop.

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Hi.

Before, the scsi controller was correctly detected, but when trying to
detect the harddiscs connected, it would go into a reset loop.

This patch, found on the scsi mailing list, solves the above problem -
tested on a dual PIII with an Adaptec AHA-2940U2/W (using the aic7xxx
driver).

The patch is against 2.4.0-test7

Who is the maintainer of scan_scsi, as I would like to see this patch go
into the kernel tree.

Regards
Anders Fugmann

-- 
. . . . . . . . . . . . F r a m f a b   A / S . . . . . . . . . . . . .
Anders Fugmann                                 Livjægergade 17A, 2.sal.
Systems Developer                              DK-2100 København Ø.
E-mail: anders.fugmann@framfab.dk              Telefon: +45 39 17 48 48
Direkte: +45 39 17 48 38                       http://www.framfab.dk
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

--- linux/drivers/scsi/scsi_scan.c.orig Wed Jul 19 07:26:13 2000 +++ linux/drivers/scsi/scsi_scan.c Wed Aug 16 11:34:45 2000 @@ -488,7 +488,38 @@ SDpnt->expecting_cc_ua = 0; SDpnt->starved = 0; + scsi_cmd[0] = TEST_UNIT_READY; + scsi_cmd[1] = lun << 5; + scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[4] = scsi_cmd[5] = 0; + SRpnt = scsi_allocate_request(SDpnt); + + SRpnt->sr_data_direction = SCSI_DATA_NONE; + scsi_wait_req (SRpnt, (void *) scsi_cmd, + (void *) NULL, + 0, SCSI_TIMEOUT + 4 * HZ, 5); + + SCSI_LOG_SCAN_BUS(3, printk("scsi: scan_scsis_single id %d lun %d. Return code 0x%08x\n", + dev, lun, SRpnt->sr_result)); + SCSI_LOG_SCAN_BUS(3, print_driverbyte(SRpnt->sr_result)); + SCSI_LOG_SCAN_BUS(3, print_hostbyte(SRpnt->sr_result)); + SCSI_LOG_SCAN_BUS(3, printk("\n")); + + if (SRpnt->sr_result) { + if (((driver_byte(SRpnt->sr_result) & DRIVER_SENSE) || + (status_byte(SRpnt->sr_result) & CHECK_CONDITION)) && + ((SRpnt->sr_sense_buffer[0] & 0x70) >> 4) == 7) { + if (((SRpnt->sr_sense_buffer[2] & 0xf) != NOT_READY) && + ((SRpnt->sr_sense_buffer[2] & 0xf) != UNIT_ATTENTION) && + ((SRpnt->sr_sense_buffer[2] & 0xf) != ILLEGAL_REQUEST || lun > 0)) { + scsi_release_request(SRpnt); + return 1; + } + } else { + scsi_release_request(SRpnt); + return 0; + } + } /* * We used to do a TEST_UNIT_READY before the INQUIRY but that was

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