scsi: storvsc: Resolve data race in storvsc_probe()

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vmscsi_size_delta can be written concurrently by multiple instances of
storvsc_probe(), corresponding to multiple synthetic IDE/SCSI devices;
cf. storvsc_drv's probe_type == PROBE_PREFER_ASYNCHRONOUS.  Change the
global variable vmscsi_size_delta to per-synthetic-IDE/SCSI-device.

Link: https://lore.kernel.org/r/20201217203321.4539-3-parri.andrea@gmail.com
Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: linux-scsi@vger.kernel.org
Suggested-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

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Andrea Parri (Microsoft) 2020-12-17 21:33:20 +01:00 • committed by Martin K. Petersen

parent ab548fd21e

commit 244808e030

1 changed files with 25 additions and 20 deletions

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drivers/scsi/storvsc_drv.c

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