From a621bac3044ed6f7ec5fa0326491b2d4838bfa93 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Fri, 13 May 2016 12:04:06 -0700 Subject: scsi_lib: correctly retry failed zero length REQ_TYPE_FS commands When SCSI was written, all commands coming from the filesystem (REQ_TYPE_FS commands) had data. This meant that our signal for needing to complete the command was the number of bytes completed being equal to the number of bytes in the request. Unfortunately, with the advent of flush barriers, we can now get zero length REQ_TYPE_FS commands, which confuse this logic because they satisfy the condition every time. This means they never get retried even for retryable conditions, like UNIT ATTENTION because we complete them early assuming they're done. Fix this by special casing the early completion condition to recognise zero length commands with errors and let them drop through to the retry code. Cc: stable@vger.kernel.org Reported-by: Sebastian Parschauer Signed-off-by: James E.J. Bottomley Tested-by: Jack Wang Signed-off-by: Martin K. Petersen --- drivers/scsi/scsi_lib.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index b2e332af0f51..c71344aebdbb 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -821,9 +821,12 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes) } /* - * If we finished all bytes in the request we are done now. + * special case: failed zero length commands always need to + * drop down into the retry code. Otherwise, if we finished + * all bytes in the request we are done now. */ - if (!scsi_end_request(req, error, good_bytes, 0)) + if (!(blk_rq_bytes(req) == 0 && error) && + !scsi_end_request(req, error, good_bytes, 0)) return; /* -- cgit v1.2.3 From eb72d0bb84eee5d0dc3044fd17b75e7101dabb57 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Tue, 26 Apr 2016 08:06:58 +0200 Subject: sd: get disk reference in sd_check_events() sd_check_events() is called asynchronously, and might race with device removal. So always take a disk reference when processing the event to avoid the device being removed while the event is processed. Signed-off-by: Hannes Reinecke Reviewed-by: Ewan D. Milne Reviewed-by: Bart Van Assche Signed-off-by: Martin K. Petersen --- drivers/scsi/sd.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 428c03ef02b2..f459dff30512 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1398,11 +1398,15 @@ static int media_not_present(struct scsi_disk *sdkp, **/ static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing) { - struct scsi_disk *sdkp = scsi_disk(disk); - struct scsi_device *sdp = sdkp->device; + struct scsi_disk *sdkp = scsi_disk_get(disk); + struct scsi_device *sdp; struct scsi_sense_hdr *sshdr = NULL; int retval; + if (!sdkp) + return 0; + + sdp = sdkp->device; SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n")); /* @@ -1459,6 +1463,7 @@ out: kfree(sshdr); retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0; sdp->changed = 0; + scsi_disk_put(sdkp); return retval; } -- cgit v1.2.3 From 7ebd67e0dece0ec53e5541fc600eda4e050fab72 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 12 May 2016 23:37:38 +0300 Subject: mpt3sas: add missing curly braces There are some missing curly braces on this if statement, so we end up printing when we shouldn't. Fixes: a470a51cd648 ('mpt3sas: Handle active cable exception event') Signed-off-by: Dan Carpenter Acked-by: Chaitra P B Signed-off-by: Martin K. Petersen --- drivers/scsi/mpt3sas/mpt3sas_scsih.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 6a4df5a315e9..6bff13e7afc7 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -7975,13 +7975,14 @@ mpt3sas_scsih_event_callback(struct MPT3SAS_ADAPTER *ioc, u8 msix_index, ActiveCableEventData = (Mpi26EventDataActiveCableExcept_t *) mpi_reply->EventData; if (ActiveCableEventData->ReasonCode == - MPI26_EVENT_ACTIVE_CABLE_INSUFFICIENT_POWER) + MPI26_EVENT_ACTIVE_CABLE_INSUFFICIENT_POWER) { pr_info(MPT3SAS_FMT "Currently an active cable with ReceptacleID %d", ioc->name, ActiveCableEventData->ReceptacleID); pr_info("cannot be powered and devices connected to this active cable"); pr_info("will not be seen. This active cable"); pr_info("requires %d mW of power", ActiveCableEventData->ActiveCablePowerRequirement); + } break; default: /* ignore the rest */ -- cgit v1.2.3 From 787ab6e97024926f38773287d9f98a9b330bce23 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Wed, 18 May 2016 10:16:51 +0200 Subject: aacraid: do not activate events on non-SRC adapters Only SRC-based adapters support the AifReqEvent function, so there is no point in trying to activate it on older, non-SRC based adapters. Doing so lead to crashes on older adapters. Signed-off-by: Hannes Reinecke Reviewed-by: Johannes Thumshirn Reviewed-by: Raghava Aditya Renukunta Signed-off-by: Martin K. Petersen --- drivers/scsi/aacraid/aacraid.h | 5 +++++ drivers/scsi/aacraid/linit.c | 11 ++++++----- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index 8f90d9e77104..969c312de1be 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -620,6 +620,11 @@ struct aac_driver_ident */ #define AAC_QUIRK_SCSI_32 0x0020 +/* + * SRC based adapters support the AifReqEvent functions + */ +#define AAC_QUIRK_SRC 0x0040 + /* * The adapter interface specs all queues to be located in the same * physically contiguous block. The host structure that defines the diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c index a943bd230bc2..79871f3519ff 100644 --- a/drivers/scsi/aacraid/linit.c +++ b/drivers/scsi/aacraid/linit.c @@ -236,10 +236,10 @@ static struct aac_driver_ident aac_drivers[] = { { aac_rx_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec Catch All */ { aac_rkt_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec Rocket Catch All */ { aac_nark_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec NEMER/ARK Catch All */ - { aac_src_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec PMC Series 6 (Tupelo) */ - { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec PMC Series 7 (Denali) */ - { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2 }, /* Adaptec PMC Series 8 */ - { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2 } /* Adaptec PMC Series 9 */ + { aac_src_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 6 (Tupelo) */ + { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 7 (Denali) */ + { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC }, /* Adaptec PMC Series 8 */ + { aac_srcv_init, "aacraid", "ADAPTEC ", "RAID ", 2, AAC_QUIRK_SRC } /* Adaptec PMC Series 9 */ }; /** @@ -1299,7 +1299,8 @@ static int aac_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) else shost->this_id = shost->max_id; - aac_intr_normal(aac, 0, 2, 0, NULL); + if (aac_drivers[index].quirks & AAC_QUIRK_SRC) + aac_intr_normal(aac, 0, 2, 0, NULL); /* * dmb - we may need to move the setting of these parms somewhere else once -- cgit v1.2.3