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Bart Van Assche
255ee9320e
If a device is blocked, make __scsi_remove_device() cause it to transition to the DEL state. This means that all the commands issued in .shutdown() will error in the mid-layer, thus making the removal proceed without being stopped. This patch is a slightly modified version of a patch from James Bottomley. This patch avoids that the following lockup occurs: Call Trace: schedule+0x35/0x80 schedule_timeout+0x237/0x2d0 io_schedule_timeout+0xa6/0x110 wait_for_completion_io+0xa3/0x110 blk_execute_rq+0xdf/0x120 scsi_execute+0xce/0x150 [scsi_mod] scsi_execute_req_flags+0x8f/0xf0 [scsi_mod] sd_sync_cache+0xa9/0x190 [sd_mod] sd_shutdown+0x6a/0x100 [sd_mod] sd_remove+0x64/0xc0 [sd_mod] __device_release_driver+0x8d/0x120 device_release_driver+0x1e/0x30 bus_remove_device+0xf9/0x170 device_del+0x127/0x240 __scsi_remove_device+0xc1/0xd0 [scsi_mod] scsi_forget_host+0x57/0x60 [scsi_mod] scsi_remove_host+0x72/0x110 [scsi_mod] srp_remove_work+0x8b/0x200 [ib_srp] Reported-by: Israel Rukshin <israelr@mellanox.com> Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Israel Rukshin <israelr@mellanox.com> Cc: Max Gurtovoy <maxg@mellanox.com> Cc: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.