scsi: sd: Fix capacity calculation with 32-bit sector_t

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commit 7c856152cb upstream.

We previously made sure that the reported disk capacity was less than
0xffffffff blocks when the kernel was not compiled with large sector_t
support (CONFIG_LBDAF). However, this check assumed that the capacity
was reported in units of 512 bytes.

Add a sanity check function to ensure that we only enable disks if the
entire reported capacity can be expressed in terms of sector_t.

Reported-by: Steve Magnani <steve.magnani@digidescorp.com>
Cc: Bart Van Assche <Bart.VanAssche@sandisk.com>
Reviewed-by: Bart Van Assche <Bart.VanAssche@sandisk.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Martin K. Petersen 2017-04-04 10:42:30 -04:00 • committed by Greg Kroah-Hartman

parent 64e746983c

commit 08383b0044

1 changed files with 18 additions and 2 deletions

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drivers/scsi/sd.c

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