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authorDouglas Gilbert <dougg@torque.net>2006-03-28 14:48:22 -0500
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-04-13 10:13:27 -0500
commitc06bb7f514567efa39062a781679120e51caa818 (patch)
treed58b61ab78469e7d4a94935ad8169c9764b9f54a /drivers
parentd6159c17c2c76963a8067d1e1ac3c4c36c05e674 (diff)
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[SCSI] sg: fix leak when dio setup fails
when the sg driver is unable to setup direct IO, free that scatter gather list prior to falling back to indirect IO Further to this thread started by Bryan Holty: http://marc.theaimsgroup.com/?l=linux-scsi&m=114306885116728&w=2 Here is the reworked patch again. This time it has been tested with a program provided by Bryan. Signed-off-by: Douglas Gilbert <dougg@torque.net> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/sg.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index bfa86b3..b098942 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1799,8 +1799,10 @@ sg_build_direct(Sg_request * srp, Sg_fd * sfp, int dxfer_len)
res = st_map_user_pages(schp->buffer, mx_sc_elems,
(unsigned long)hp->dxferp, dxfer_len,
(SG_DXFER_TO_DEV == hp->dxfer_direction) ? 1 : 0);
- if (res <= 0)
+ if (res <= 0) {
+ sg_remove_scat(schp);
return 1;
+ }
schp->k_use_sg = res;
schp->dio_in_use = 1;
hp->info |= SG_INFO_DIRECT_IO;