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| author |   Christoph Hellwig <hch@lst.de> | 2019-07-22 11:20:38 +0200 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2019-07-22 22:05:48 -0400 |
| commit | 1b5d9a6e98350e0713b4faa1b04e8f239f63b581 (patch) | |
| tree | 8433fa141ffb58e7d4343a1d18d4b3da9d1e3a05 /drivers/scsi/megaraid/megaraid_sas_base.c | |
| parent | scsi: fdomain: fix building pcmcia front-end (diff) | |
| download | linux-dev-1b5d9a6e98350e0713b4faa1b04e8f239f63b581.tar.xz linux-dev-1b5d9a6e98350e0713b4faa1b04e8f239f63b581.zip | |
scsi: core: fix the dma_max_mapping_size call
We should only call dma_max_mapping_size for devices that have a DMA mask
set, otherwise we can run into a NULL pointer dereference that will crash
the system.
Also we need to do right shift to get the sectors from the size in bytes,
not a left shift.
Fixes: bdd17bdef7d8 ("scsi: core: take the DMA max mapping size into account")
Reported-by: Bart Van Assche <bvanassche@acm.org>
Reported-by: Ming Lei <tom.leiming@gmail.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions