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path: root/drivers/scsi/sg.c
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Diffstat (limited to 'drivers/scsi/sg.c')
-rw-r--r--drivers/scsi/sg.c55
1 files changed, 8 insertions, 47 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 5a0a19322d0..7405d0df95d 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -44,7 +44,6 @@ static int sg_version_num = 30533; /* 2 digits for each component */
#include <linux/poll.h>
#include <linux/smp_lock.h>
#include <linux/moduleparam.h>
-#include <linux/devfs_fs_kernel.h>
#include <linux/cdev.h>
#include <linux/seq_file.h>
#include <linux/blkdev.h>
@@ -1140,32 +1139,6 @@ sg_fasync(int fd, struct file *filp, int mode)
return (retval < 0) ? retval : 0;
}
-/* When startFinish==1 increments page counts for pages other than the
- first of scatter gather elements obtained from alloc_pages().
- When startFinish==0 decrements ... */
-static void
-sg_rb_correct4mmap(Sg_scatter_hold * rsv_schp, int startFinish)
-{
- struct scatterlist *sg = rsv_schp->buffer;
- struct page *page;
- int k, m;
-
- SCSI_LOG_TIMEOUT(3, printk("sg_rb_correct4mmap: startFinish=%d, scatg=%d\n",
- startFinish, rsv_schp->k_use_sg));
- /* N.B. correction _not_ applied to base page of each allocation */
- for (k = 0; k < rsv_schp->k_use_sg; ++k, ++sg) {
- for (m = PAGE_SIZE; m < sg->length; m += PAGE_SIZE) {
- page = sg->page;
- if (startFinish)
- get_page(page);
- else {
- if (page_count(page) > 0)
- __put_page(page);
- }
- }
- }
-}
-
static struct page *
sg_vma_nopage(struct vm_area_struct *vma, unsigned long addr, int *type)
{
@@ -1237,10 +1210,7 @@ sg_mmap(struct file *filp, struct vm_area_struct *vma)
sa += len;
}
- if (0 == sfp->mmap_called) {
- sg_rb_correct4mmap(rsv_schp, 1); /* do only once per fd lifetime */
- sfp->mmap_called = 1;
- }
+ sfp->mmap_called = 1;
vma->vm_flags |= VM_RESERVED;
vma->vm_private_data = sfp;
vma->vm_ops = &sg_mmap_vm_ops;
@@ -1361,7 +1331,7 @@ static int sg_alloc(struct gendisk *disk, struct scsi_device *scsidp)
void *old_sg_dev_arr = NULL;
int k, error;
- sdp = kmalloc(sizeof(Sg_device), GFP_KERNEL);
+ sdp = kzalloc(sizeof(Sg_device), GFP_KERNEL);
if (!sdp) {
printk(KERN_WARNING "kmalloc Sg_device failure\n");
return -ENOMEM;
@@ -1373,12 +1343,11 @@ static int sg_alloc(struct gendisk *disk, struct scsi_device *scsidp)
int tmp_dev_max = sg_nr_dev + SG_DEV_ARR_LUMP;
write_unlock_irqrestore(&sg_dev_arr_lock, iflags);
- tmp_da = kmalloc(tmp_dev_max * sizeof(Sg_device *), GFP_KERNEL);
+ tmp_da = kzalloc(tmp_dev_max * sizeof(Sg_device *), GFP_KERNEL);
if (unlikely(!tmp_da))
goto expand_failed;
write_lock_irqsave(&sg_dev_arr_lock, iflags);
- memset(tmp_da, 0, tmp_dev_max * sizeof(Sg_device *));
memcpy(tmp_da, sg_dev_arr, sg_dev_max * sizeof(Sg_device *));
old_sg_dev_arr = sg_dev_arr;
sg_dev_arr = tmp_da;
@@ -1391,7 +1360,6 @@ static int sg_alloc(struct gendisk *disk, struct scsi_device *scsidp)
if (unlikely(k >= SG_MAX_DEVS))
goto overflow;
- memset(sdp, 0, sizeof(*sdp));
SCSI_LOG_TIMEOUT(3, printk("sg_alloc: dev=%d \n", k));
sprintf(disk->disk_name, "sg%d", k);
disk->first_minor = k;
@@ -1458,14 +1426,10 @@ sg_add(struct class_device *cl_dev, struct class_interface *cl_intf)
k = error;
sdp = sg_dev_arr[k];
- devfs_mk_cdev(MKDEV(SCSI_GENERIC_MAJOR, k),
- S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP,
- "%s/generic", scsidp->devfs_name);
error = cdev_add(cdev, MKDEV(SCSI_GENERIC_MAJOR, k), 1);
- if (error) {
- devfs_remove("%s/generic", scsidp->devfs_name);
+ if (error)
goto out;
- }
+
sdp->cdev = cdev;
if (sg_sysfs_valid) {
struct class_device * sg_class_member;
@@ -1555,7 +1519,6 @@ sg_remove(struct class_device *cl_dev, struct class_interface *cl_intf)
class_device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, k));
cdev_del(sdp->cdev);
sdp->cdev = NULL;
- devfs_remove("%s/generic", scsidp->devfs_name);
put_disk(sdp->disk);
sdp->disk = NULL;
if (NULL == sdp->headfp)
@@ -1577,6 +1540,7 @@ MODULE_AUTHOR("Douglas Gilbert");
MODULE_DESCRIPTION("SCSI generic (sg) driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(SG_VERSION_STR);
+MODULE_ALIAS_CHARDEV_MAJOR(SCSI_GENERIC_MAJOR);
MODULE_PARM_DESC(def_reserved_size, "size of buffer reserved for each fd");
MODULE_PARM_DESC(allow_dio, "allow direct I/O (default: 0 (disallow))");
@@ -2395,8 +2359,6 @@ __sg_remove_sfp(Sg_device * sdp, Sg_fd * sfp)
SCSI_LOG_TIMEOUT(6,
printk("__sg_remove_sfp: bufflen=%d, k_use_sg=%d\n",
(int) sfp->reserve.bufflen, (int) sfp->reserve.k_use_sg));
- if (sfp->mmap_called)
- sg_rb_correct4mmap(&sfp->reserve, 0); /* undo correction */
sg_remove_scat(&sfp->reserve);
}
sfp->parentdp = NULL;
@@ -2478,9 +2440,9 @@ sg_page_malloc(int rqSz, int lowDma, int *retSzp)
return resp;
if (lowDma)
- page_mask = GFP_ATOMIC | GFP_DMA | __GFP_NOWARN;
+ page_mask = GFP_ATOMIC | GFP_DMA | __GFP_COMP | __GFP_NOWARN;
else
- page_mask = GFP_ATOMIC | __GFP_NOWARN;
+ page_mask = GFP_ATOMIC | __GFP_COMP | __GFP_NOWARN;
for (order = 0, a_size = PAGE_SIZE; a_size < rqSz;
order++, a_size <<= 1) ;
@@ -2974,4 +2936,3 @@ static int sg_proc_seq_show_debug(struct seq_file *s, void *v)
module_init(init_sg);
module_exit(exit_sg);
-MODULE_ALIAS_CHARDEV_MAJOR(SCSI_GENERIC_MAJOR);