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

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 <kai.makisara@kolumbus.fi>
Reported-by: Lukas Kolbe <lkolbe@techfak.uni-bielefeld.de>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
hifive-unleashed-5.1
Kai Makisara 2010-12-20 18:43:39 +02:00 committed by James Bottomley
parent a87e3a67d5
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;
}