diff options
| -rw-r--r-- | block/ll_rw_blk.c | 2 | ||||
| -rw-r--r-- | block/scsi_ioctl.c | 4 | ||||
| -rw-r--r-- | drivers/scsi/sg.c | 13 |
3 files changed, 16 insertions, 3 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index 38c293b987b..cf8752abd61 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1925,6 +1925,8 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id) blk_queue_max_hw_segments(q, MAX_HW_SEGMENTS); blk_queue_max_phys_segments(q, MAX_PHYS_SEGMENTS); + q->sg_reserved_size = INT_MAX; + /* * all done */ diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index 65c6a3cba6d..e83f1dbf7c2 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -78,7 +78,9 @@ static int sg_set_timeout(request_queue_t *q, int __user *p) static int sg_get_reserved_size(request_queue_t *q, int __user *p) { - return put_user(q->sg_reserved_size, p); + unsigned val = min(q->sg_reserved_size, q->max_sectors << 9); + + return put_user(val, p); } static int sg_set_reserved_size(request_queue_t *q, int __user *p) diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c index 81e3bc7b02a..570977cf9ef 100644 --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -917,6 +917,8 @@ sg_ioctl(struct inode *inode, struct file *filp, return result; if (val < 0) return -EINVAL; + val = min_t(int, val, + sdp->device->request_queue->max_sectors * 512); if (val != sfp->reserve.bufflen) { if (sg_res_in_use(sfp) || sfp->mmap_called) return -EBUSY; @@ -925,7 +927,8 @@ sg_ioctl(struct inode *inode, struct file *filp, } return 0; case SG_GET_RESERVED_SIZE: - val = (int) sfp->reserve.bufflen; + val = min_t(int, sfp->reserve.bufflen, + sdp->device->request_queue->max_sectors * 512); return put_user(val, ip); case SG_SET_COMMAND_Q: result = get_user(val, ip); @@ -1061,6 +1064,9 @@ sg_ioctl(struct inode *inode, struct file *filp, if (sdp->detached) return -ENODEV; return scsi_ioctl(sdp->device, cmd_in, p); + case BLKSECTGET: + return put_user(sdp->device->request_queue->max_sectors * 512, + ip); default: if (read_only) return -EPERM; /* don't know so take safe approach */ @@ -2339,6 +2345,7 @@ sg_add_sfp(Sg_device * sdp, int dev) { Sg_fd *sfp; unsigned long iflags; + int bufflen; sfp = kzalloc(sizeof(*sfp), GFP_ATOMIC | __GFP_NOWARN); if (!sfp) @@ -2369,7 +2376,9 @@ sg_add_sfp(Sg_device * sdp, int dev) if (unlikely(sg_big_buff != def_reserved_size)) sg_big_buff = def_reserved_size; - sg_build_reserve(sfp, sg_big_buff); + bufflen = min_t(int, sg_big_buff, + sdp->device->request_queue->max_sectors * 512); + sg_build_reserve(sfp, bufflen); SCSI_LOG_TIMEOUT(3, printk("sg_add_sfp: bufflen=%d, k_use_sg=%d\n", sfp->reserve.bufflen, sfp->reserve.k_use_sg)); return sfp; |