scsi: sg: sg_read(): simplify reading ->pack_id of userland sg_io_hdr_t

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We don't need to allocate a temporary buffer and read the entire structure
in it, only to fetch a single field and free what we'd allocated.  Just use
get_user() and be done with it...

Link: https://lore.kernel.org/r/20191017193925.25539-4-viro@ZenIV.linux.org.uk
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

...

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Al Viro 2019-10-17 20:39:21 +01:00 • committed by Martin K. Petersen

parent 062c9d4527

commit c35a5cfb41

1 changed files with 2 additions and 11 deletions

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drivers/scsi/sg.c

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