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Commit b2bff6ce authored by Martin K. Petersen's avatar Martin K. Petersen Committed by James Bottomley
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[SCSI] sd: Quiesce mode sense error messages 

Messages about discovered disk properties are only printed once unless
they are found to have changed. Errors encountered during mode sense,
however, are printed every time we revalidate.

Quiesce mode sense errors so they are only printed during the first
scan.

[jejb: checkpatch fixes]
Bugzilla: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=733565


Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarJames Bottomley <JBottomley@Parallels.com>
parent 89d9a567

drivers/scsi/sd.c

+22 −16
Original line number Diff line number Diff line
@@ -2281,7 +2281,7 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) 


	set_disk_ro(sdkp->disk, 0);

	if (sdp->skip_ms_page_3f) {

		sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");

		sd_first_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");

		return;

	}
@@ -2313,7 +2313,7 @@ sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer) 
	}



	if (!scsi_status_is_good(res)) {

		sd_printk(KERN_WARNING, sdkp,

		sd_first_printk(KERN_WARNING, sdkp,

			  "Test WP failed, assume Write Enabled\n");

	} else {

		sdkp->write_prot = ((data.device_specific & 0x80) != 0);
@@ -2381,7 +2381,8 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) 
	if (!data.header_length) {

		modepage = 6;

		first_len = 0;

		sd_printk(KERN_ERR, sdkp, "Missing header in MODE_SENSE response\n");

		sd_first_printk(KERN_ERR, sdkp,

				"Missing header in MODE_SENSE response\n");

	}



	/* that went OK, now ask for the proper length */
@@ -2394,7 +2395,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) 
	if (len < 3)

		goto bad_sense;

	else if (len > SD_BUF_SIZE) {

		sd_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "

		sd_first_printk(KERN_NOTICE, sdkp, "Truncating mode parameter "

			  "data from %d to %d bytes\n", len, SD_BUF_SIZE);

		len = SD_BUF_SIZE;

	}
@@ -2417,8 +2418,9 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) 
				/* We're interested only in the first 3 bytes.

				 */

				if (len - offset <= 2) {

					sd_printk(KERN_ERR, sdkp, "Incomplete "

						  "mode parameter data\n");

					sd_first_printk(KERN_ERR, sdkp,

						"Incomplete mode parameter "

							"data\n");

					goto defaults;

				} else {

					modepage = page_code;
@@ -2432,14 +2434,15 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) 
				else if (!spf && len - offset > 1)

					offset += 2 + buffer[offset+1];

				else {

					sd_printk(KERN_ERR, sdkp, "Incomplete "

						  "mode parameter data\n");

					sd_first_printk(KERN_ERR, sdkp,

							"Incomplete mode "

							"parameter data\n");

					goto defaults;

				}

			}

		}



		sd_printk(KERN_ERR, sdkp, "No Caching mode page found\n");

		sd_first_printk(KERN_ERR, sdkp, "No Caching mode page found\n");

		goto defaults;



	Page_found:
@@ -2453,7 +2456,7 @@ sd_read_cache_type(struct scsi_disk *sdkp, unsigned char *buffer) 


		sdkp->DPOFUA = (data.device_specific & 0x10) != 0;

		if (sdkp->DPOFUA && !sdkp->device->use_10_for_rw) {

			sd_printk(KERN_NOTICE, sdkp,

			sd_first_printk(KERN_NOTICE, sdkp,

				  "Uses READ/WRITE(6), disabling FUA\n");

			sdkp->DPOFUA = 0;

		}
@@ -2475,16 +2478,19 @@ bad_sense: 
	    sshdr.sense_key == ILLEGAL_REQUEST &&

	    sshdr.asc == 0x24 && sshdr.ascq == 0x0)

		/* Invalid field in CDB */

		sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");

		sd_first_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");

	else

		sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n");

		sd_first_printk(KERN_ERR, sdkp,

				"Asking for cache data failed\n");



defaults:

	if (sdp->wce_default_on) {

		sd_printk(KERN_NOTICE, sdkp, "Assuming drive cache: write back\n");

		sd_first_printk(KERN_NOTICE, sdkp,

				"Assuming drive cache: write back\n");

		sdkp->WCE = 1;

	} else {

		sd_printk(KERN_ERR, sdkp, "Assuming drive cache: write through\n");

		sd_first_printk(KERN_ERR, sdkp,

				"Assuming drive cache: write through\n");

		sdkp->WCE = 0;

	}

	sdkp->RCD = 0;
@@ -2513,7 +2519,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) 


	if (!scsi_status_is_good(res) || !data.header_length ||

	    data.length < 6) {

		sd_printk(KERN_WARNING, sdkp,

		sd_first_printk(KERN_WARNING, sdkp,

			  "getting Control mode page failed, assume no ATO\n");



		if (scsi_sense_valid(&sshdr))
@@ -2525,7 +2531,7 @@ static void sd_read_app_tag_own(struct scsi_disk *sdkp, unsigned char *buffer) 
	offset = data.header_length + data.block_descriptor_length;



	if ((buffer[offset] & 0x3f) != 0x0a) {

		sd_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");

		sd_first_printk(KERN_ERR, sdkp, "ATO Got wrong page\n");

		return;

	}

drivers/scsi/sd.h

+6 −0
Original line number Diff line number Diff line
@@ -104,6 +104,12 @@ static inline struct scsi_disk *scsi_disk(struct gendisk *disk) 
		    (sdsk)->disk->disk_name, ##a) :			\

	sdev_printk(prefix, (sdsk)->device, fmt, ##a)



#define sd_first_printk(prefix, sdsk, fmt, a...)			\

	do {								\

		if ((sdkp)->first_scan)					\

			sd_printk(prefix, sdsk, fmt, ##a);		\

	} while (0)



static inline int scsi_medium_access_command(struct scsi_cmnd *scmd)

{

	switch (scmd->cmnd[0]) {