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[SCSI] st: Store page order before driver buffer allocation

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The order of the pages allocated for the driver buffer must be stored before
allocation because it is used in freeing already allocated pages if
allocation fails.

Signed-off-by: Kai Makisara <[email protected]>
Reported-by: Lukas Kolbe <[email protected]>
Signed-off-by: James Bottomley <[email protected]>
This commit is contained in:
Kai Makisara 2010-12-20 18:43:39 +02:00 • committed by James Bottomley
commit 373daacfce
1 changed files with 2 additions and 2 deletions
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4
drivers/scsi/st.c
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@ -17,7 +17,7 @@
Last modified: 18-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support
*/
static const char *verstr = "20100829";
static const char *verstr = "20101219";
#include <linux/module.h>
@ -3732,6 +3732,7 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm
order < ST_MAX_ORDER && b_size < new_size;
order++, b_size *= 2)
; /* empty */
STbuffer->reserved_page_order = order;
}
if (max_segs * (PAGE_SIZE << order) < new_size) {
if (order == ST_MAX_ORDER)
@ -3758,7 +3759,6 @@ static int enlarge_buffer(struct st_buffer * STbuffer, int new_size, int need_dm
segs++;
}
STbuffer->b_data = page_address(STbuffer->reserved_pages[0]);
STbuffer->reserved_page_order = order;
return 1;
}