blackbird-op-linux/drivers/scsi/fnic, branch master

scsi: fnic: do not queue commands during fwreset

2020-01-21T04:58:14+00:00

When a link is going down the driver will be calling fnic_cleanup_io(), which will traverse all commands and calling 'done' for each found command. While the traversal is handled under the host_lock, calling 'done' happens after the host_lock is being dropped. As fnic_queuecommand_lck() is being called with the host_lock held, it might well be that it will pick the command being selected for abortion from the above routine and enqueue it for sending, but then 'done' is being called on that very command from the above routine. Which of course confuses the hell out of the scsi midlayer. So fix this by not queueing commands when fnic_cleanup_io is active. Link: https://lore.kernel.org/r/20200116102053.62755-1-hare@suse.de Signed-off-by: Hannes Reinecke Signed-off-by: Martin K. Petersen

scsi: fnic: fix invalid stack access

2020-01-16T03:59:59+00:00

gcc -O3 warns that some local variables are not properly initialized: drivers/scsi/fnic/vnic_dev.c: In function 'fnic_dev_hang_notify': drivers/scsi/fnic/vnic_dev.c:511:16: error: 'a0' is used uninitialized in this function [-Werror=uninitialized] vdev->args[0] = *a0; ~~~~~~~~~~~~~~^~~~~ drivers/scsi/fnic/vnic_dev.c:691:6: note: 'a0' was declared here u64 a0, a1; ^~ drivers/scsi/fnic/vnic_dev.c:512:16: error: 'a1' is used uninitialized in this function [-Werror=uninitialized] vdev->args[1] = *a1; ~~~~~~~~~~~~~~^~~~~ drivers/scsi/fnic/vnic_dev.c:691:10: note: 'a1' was declared here u64 a0, a1; ^~ drivers/scsi/fnic/vnic_dev.c: In function 'fnic_dev_mac_addr': drivers/scsi/fnic/vnic_dev.c:512:16: error: 'a1' is used uninitialized in this function [-Werror=uninitialized] vdev->args[1] = *a1; ~~~~~~~~~~~~~~^~~~~ drivers/scsi/fnic/vnic_dev.c:698:10: note: 'a1' was declared here u64 a0, a1; ^~ Apparently the code relies on the local variables occupying adjacent memory locations in the same order, but this is of course not guaranteed. Use an array of two u64 variables where needed to make it work correctly. I suspect there is also an endianness bug here, but have not digged in deep enough to be sure. Fixes: 5df6d737dd4b ("[SCSI] fnic: Add new Cisco PCI-Express FCoE HBA") Fixes: mmtom ("init/Kconfig: enable -O3 for all arches") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20200107201602.4096790-1-arnd@arndb.de Signed-off-by: Arnd Bergmann Signed-off-by: Martin K. Petersen

scsi: fnic: fix use after free

2019-11-06T05:04:02+00:00

The memory chunk io_req is released by mempool_free. Accessing io_req->start_time will result in a use after free bug. The variable start_time is a backup of the timestamp. So, use start_time here to avoid use after free. Link: https://lore.kernel.org/r/1572881182-37664-1-git-send-email-bianpan2016@163.com Signed-off-by: Pan Bian Reviewed-by: Satish Kharat Signed-off-by: Martin K. Petersen

scsi: fnic: make array dev_cmd_err static const, makes object smaller

2019-10-01T02:45:36+00:00

Don't populate the array dev_cmd_err on the stack but instead make it static const. Makes the object code smaller by 80 bytes. Before: text data bss dec hex filename 21461 1564 0 23025 59f1 drivers/scsi/fnic/vnic_dev.o After: text data bss dec hex filename 21318 1628 0 22946 59a2 drivers/scsi/fnic/vnic_dev.o (gcc version 9.2.1, amd64) Link: https://lore.kernel.org/r/20190906163945.3889-1-colin.king@canonical.com Signed-off-by: Colin Ian King Signed-off-by: Martin K. Petersen

scsi: fnic: fix msix interrupt allocation

2019-09-07T19:29:12+00:00

pci_alloc_irq_vectors() returns number of vectors allocated. Fix the check for error condition. Fixes: cca678dfbad49 ("scsi: fnic: switch to pci_alloc_irq_vectors") Link: https://lore.kernel.org/r/20190827211340.1095-1-gvaradar@cisco.com Signed-off-by: Govindarajulu Varadarajan Acked-by: Satish Kharat Signed-off-by: Martin K. Petersen

scsi: fnic: print port speed only at driver init or speed change

2019-08-30T07:32:35+00:00

Port speed printing was added by commit d948e6383ec3 ("scsi: fnic: Add port speed stat to fnic debug stats"). As currently configured, this will cause the port speed to be printed to syslog every 2 seconds. To prevent log spamming, only print the vnic port speed at driver initialization and if the speed changes. Also clean up a small typo in fnic_trace.c. Fixes: d948e6383ec3 ("scsi: fnic: Add port speed stat to fnic debug stats") Signed-off-by: John Pittman Reviewed-by: Satish Kharat Signed-off-by: Martin K. Petersen

scsi: fnic: remove redundant assignment of variable rc

2019-08-20T01:51:00+00:00

Variable ret is initialized to a value that is never read and it is re-assigned later and immediately returns. Clean up the code by removing rc and just returning 0. [mkp: typo] Addresses-Coverity: ("Unused value") Signed-off-by: Colin Ian King Acked-by: Karan Tilak Kumar Signed-off-by: Martin K. Petersen

scsi: fnic: Remove set but not used variable 'vdev'

2019-01-29T06:16:09+00:00

Fixes gcc '-Wunused-but-set-variable' warning: drivers/scsi/fnic/vnic_wq.c: In function 'vnic_wq_alloc_bufs': drivers/scsi/fnic/vnic_wq.c:50:19: warning: variable 'vdev' set but not used [-Wunused-but-set-variable] drivers/scsi/fnic/vnic_rq.c: In function 'vnic_rq_alloc_bufs': drivers/scsi/fnic/vnic_rq.c:30:19: warning: variable 'vdev' set but not used [-Wunused-but-set-variable] Never used since introduction. Signed-off-by: YueHaibing Acked-by: Satish Kharat Signed-off-by: Martin K. Petersen

scsi: fnic: no need to check return value of debugfs_create functions

2019-01-29T05:40:53+00:00

When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: Satish Kharat Cc: Sesidhar Baddela Cc: Karan Tilak Kumar Cc: "James E.J. Bottomley" Cc: "Martin K. Petersen" Cc: linux-scsi@vger.kernel.org Signed-off-by: Greg Kroah-Hartman Acked-by: Satish Kharat Signed-off-by: Greg Kroah-Hartman Signed-off-by: Martin K. Petersen

scsi: fnic: Update fnic driver version to 1.6.0.47

2019-01-23T02:18:35+00:00

Update fnic driver to version 1.6.0.47. Signed-off-by: Satish Kharat Signed-off-by: Martin K. Petersen