diff options
Diffstat (limited to 'drivers/scsi/sd.c')
| -rw-r--r-- | drivers/scsi/sd.c | 34 |
1 files changed, 19 insertions, 15 deletions
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index e6c4bff04339..9846c6ab2aaa 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -110,7 +110,7 @@ static int sd_suspend_runtime(struct device *); static int sd_resume(struct device *); static void sd_rescan(struct device *); static int sd_done(struct scsi_cmnd *); -static int sd_eh_action(struct scsi_cmnd *, unsigned char *, int, int); +static int sd_eh_action(struct scsi_cmnd *, int); static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer); static void scsi_disk_release(struct device *cdev); static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *); @@ -1551,23 +1551,23 @@ static const struct block_device_operations sd_fops = { /** * sd_eh_action - error handling callback * @scmd: sd-issued command that has failed - * @eh_cmnd: The command that was sent during error handling - * @eh_cmnd_len: Length of eh_cmnd in bytes * @eh_disp: The recovery disposition suggested by the midlayer * - * This function is called by the SCSI midlayer upon completion of - * an error handling command (TEST UNIT READY, START STOP UNIT, - * etc.) The command sent to the device by the error handler is - * stored in eh_cmnd. The result of sending the eh command is - * passed in eh_disp. + * This function is called by the SCSI midlayer upon completion of an + * error test command (currently TEST UNIT READY). The result of sending + * the eh command is passed in eh_disp. We're looking for devices that + * fail medium access commands but are OK with non access commands like + * test unit ready (so wrongly see the device as having a successful + * recovery) **/ -static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, - int eh_cmnd_len, int eh_disp) +static int sd_eh_action(struct scsi_cmnd *scmd, int eh_disp) { struct scsi_disk *sdkp = scsi_disk(scmd->request->rq_disk); if (!scsi_device_online(scmd->device) || - !scsi_medium_access_command(scmd)) + !scsi_medium_access_command(scmd) || + host_byte(scmd->result) != DID_TIME_OUT || + eh_disp != SUCCESS) return eh_disp; /* @@ -1577,9 +1577,7 @@ static int sd_eh_action(struct scsi_cmnd *scmd, unsigned char *eh_cmnd, * process of recovering or has it suffered an internal failure * that prevents access to the storage medium. */ - if (host_byte(scmd->result) == DID_TIME_OUT && eh_disp == SUCCESS && - eh_cmnd_len && eh_cmnd[0] == TEST_UNIT_READY) - sdkp->medium_access_timed_out++; + sdkp->medium_access_timed_out++; /* * If the device keeps failing read/write commands but TEST UNIT @@ -1628,7 +1626,7 @@ static unsigned int sd_completed_bytes(struct scsi_cmnd *scmd) end_lba <<= 1; } else { /* be careful ... don't want any overflows */ - u64 factor = scmd->device->sector_size / 512; + unsigned int factor = scmd->device->sector_size / 512; do_div(start_lba, factor); do_div(end_lba, factor); } @@ -2659,6 +2657,12 @@ static void sd_read_write_same(struct scsi_disk *sdkp, unsigned char *buffer) { struct scsi_device *sdev = sdkp->device; + if (sdev->host->no_write_same) { + sdev->no_write_same = 1; + + return; + } + if (scsi_report_opcode(sdev, buffer, SD_BUF_SIZE, INQUIRY) < 0) { /* too large values might cause issues with arcmsr */ int vpd_buf_len = 64; |