UBI: use vmalloc for large buffers

UBI allocates temporary buffers of PEB size, which may be 256KiB.
Use vmalloc instead of kmalloc for such big temporary buffers.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 959044a2ddbf..34375ee6d4a4 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -153,7 +153,7 @@ static int vol_cdev_release(struct inode *inode, struct file *file)
                 ubi_warn("update of volume %d not finished, volume is damaged",
                          vol->vol_id);
                 vol->updating = 0;
-                kfree(vol->upd_buf);
+                vfree(vol->upd_buf);
         }
 
         ubi_close_volume(desc);
@@ -232,7 +232,7 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
         tbuf_size = vol->usable_leb_size;
         if (count < tbuf_size)
                 tbuf_size = ALIGN(count, ubi->min_io_size);
-        tbuf = kmalloc(tbuf_size, GFP_KERNEL);
+        tbuf = vmalloc(tbuf_size);
         if (!tbuf)
                 return -ENOMEM;
 
@@ -271,7 +271,7 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
                 len = count > tbuf_size ? tbuf_size : count;
         } while (count);
 
-        kfree(tbuf);
+        vfree(tbuf);
         return err ? err : count_save - count;
 }
 
@@ -320,7 +320,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
         tbuf_size = vol->usable_leb_size;
         if (count < tbuf_size)
                 tbuf_size = ALIGN(count, ubi->min_io_size);
-        tbuf = kmalloc(tbuf_size, GFP_KERNEL);
+        tbuf = vmalloc(tbuf_size);
         if (!tbuf)
                 return -ENOMEM;
 
@@ -355,7 +355,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
                 len = count > tbuf_size ? tbuf_size : count;
         }
 
-        kfree(tbuf);
+        vfree(tbuf);
         return err ? err : count_save - count;
 }