From 285e9670d91cdeb6b6693729950339cb45410fdc Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Tue, 14 Aug 2007 14:10:39 +0200 Subject: [SCSI] sr,sd: send media state change modification events This will send for a card reader slot (remove/add media): UEVENT[1187091572.155884] change /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi) UEVENT[1187091572.162314] remove /block/sdb/sdb1 (block) UEVENT[1187091572.172464] add /block/sdb/sdb1 (block) UEVENT[1187091572.175408] change /devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/host7/target7:0:0/7:0:0:0 (scsi) and for a DVD drive (add/eject media): UEVENT[1187091590.189159] change /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi) UEVENT[1187091590.957124] add /module/isofs (module) UEVENT[1187091604.468207] change /devices/pci0000:00/0000:00:1f.1/host4/target4:0:0/4:0:0:0 (scsi) Userspace gets events, even for unpartitioned media. This unifies the event handling for asynchronoous events (AN) and events caused by perodical polling the device from userspace. Signed-off-by: Kay Sievers [jejb: modified for new event API] Signed-off-by: James Bottomley --- drivers/scsi/sd.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a69b155..18343a6 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -749,8 +749,11 @@ static int sd_media_changed(struct gendisk *disk) * can deal with it then. It is only because of unrecoverable errors * that we would ever take a device offline in the first place. */ - if (!scsi_device_online(sdp)) - goto not_present; + if (!scsi_device_online(sdp)) { + set_media_not_present(sdkp); + retval = 1; + goto out; + } /* * Using TEST_UNIT_READY enables differentiation between drive with @@ -762,6 +765,7 @@ static int sd_media_changed(struct gendisk *disk) * sd_revalidate() is called. */ retval = -ENODEV; + if (scsi_block_when_processing_errors(sdp)) retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES); @@ -771,8 +775,11 @@ static int sd_media_changed(struct gendisk *disk) * and we will figure it out later once the drive is * available again. */ - if (retval) - goto not_present; + if (retval) { + set_media_not_present(sdkp); + retval = 1; + goto out; + } /* * For removable scsi disk we have to recognise the presence @@ -783,12 +790,11 @@ static int sd_media_changed(struct gendisk *disk) retval = sdp->changed; sdp->changed = 0; - +out: + if (retval != sdkp->previous_state) + sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); + sdkp->previous_state = retval; return retval; - -not_present: - set_media_not_present(sdkp); - return 1; } static int sd_sync_cache(struct scsi_disk *sdkp) -- cgit v1.1 From 001aac257cf8adbe90cdcba6e07f8d12dfc8fa6b Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sun, 2 Dec 2007 19:10:40 +0200 Subject: [SCSI] sd,sr: add early detection of medium not present The current scsi_test_unit_ready() is updated to return sense code information (in struct scsi_sense_hdr). The sd and sr drivers are changed to interpret the sense code return asc 0x3a as no media and adjust the device status accordingly. Signed-off-by: James Bottomley --- drivers/scsi/sd.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 18343a6..212f6bc 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -736,6 +736,7 @@ static int sd_media_changed(struct gendisk *disk) { struct scsi_disk *sdkp = scsi_disk(disk); struct scsi_device *sdp = sdkp->device; + struct scsi_sense_hdr *sshdr = NULL; int retval; SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n")); @@ -766,8 +767,11 @@ static int sd_media_changed(struct gendisk *disk) */ retval = -ENODEV; - if (scsi_block_when_processing_errors(sdp)) - retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES); + if (scsi_block_when_processing_errors(sdp)) { + sshdr = kzalloc(sizeof(*sshdr), GFP_KERNEL); + retval = scsi_test_unit_ready(sdp, SD_TIMEOUT, SD_MAX_RETRIES, + sshdr); + } /* * Unable to test, unit probably not ready. This usually @@ -775,7 +779,9 @@ static int sd_media_changed(struct gendisk *disk) * and we will figure it out later once the drive is * available again. */ - if (retval) { + if (retval || (scsi_sense_valid(sshdr) && + /* 0x3a is medium not present */ + sshdr->asc == 0x3a)) { set_media_not_present(sdkp); retval = 1; goto out; @@ -794,6 +800,7 @@ out: if (retval != sdkp->previous_state) sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL); sdkp->previous_state = retval; + kfree(sshdr); return retval; } -- cgit v1.1 From a0899d4df534d2bcf671b0f647b809842309a9ae Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sun, 20 Jan 2008 11:12:26 +0100 Subject: [SCSI] sd: add fix for devices with last sector access problems This patch adds a new scsi_device flag (last_sector_bug) for devices which contain a bug where the device crashes when the last sector is read in a larger then 1 sector read. This is for example the case with sdcards in the HP PSC1350 printer cardreader and in the HP PSC1610 printer cardreader. Signed-off-by: Hans de Goede Signed-off-by: James Bottomley --- drivers/scsi/sd.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/scsi/sd.c') diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 212f6bc..24eba31 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -395,6 +395,15 @@ static int sd_prep_fn(struct request_queue *q, struct request *rq) goto out; } + /* + * Some devices (some sdcards for one) don't like it if the + * last sector gets read in a larger then 1 sector read. + */ + if (unlikely(sdp->last_sector_bug && + rq->nr_sectors > sdp->sector_size / 512 && + block + this_count == get_capacity(disk))) + this_count -= sdp->sector_size / 512; + SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, "block=%llu\n", (unsigned long long)block)); -- cgit v1.1