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[SCSI] lpfc: Silence DEBUG_STRICT_USER_COPY_CHECKS=y warning

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Enabling DEBUG_STRICT_USER_COPY_CHECKS causes the following
warning:

In file included from arch/x86/include/asm/uaccess.h:573,
                 from include/linux/uaccess.h:5,
                 from include/linux/highmem.h:7,
                 from include/linux/pagemap.h:10,
                 from include/linux/blkdev.h:12,
                 from drivers/scsi/lpfc/lpfc_debugfs.c:21:
In function 'copy_from_user':
arch/x86/include/asm/uaccess_64.h:65:
warning: call to 'copy_from_user_overflow' declared with
attribute warning: copy_from_user() buffer size is not provably
correct

presumably due to buf_size being signed causing GCC to fail to
see that buf_size can't become negative.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Stephen Boyd 2011-05-12 16:50:06 -07:00 committed by James Bottomley
parent 0d72c6fcb5
commit b11d48e898
1 changed files with 2 additions and 1 deletions
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3
drivers/scsi/lpfc/lpfc_debugfs.c
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@ -1147,7 +1147,8 @@ static int lpfc_idiag_cmd_get(const char __user *buf, size_t nbytes,
{
char mybuf[64];
char *pbuf, *step_str;
int bsize, i;
int i;
size_t bsize;
/* Protect copy from user */
if (!access_ok(VERIFY_READ, buf, nbytes))