From ad96a7a7ea950d5bc9755f2f568be185c7070f1e Mon Sep 17 00:00:00 2001
From: Julia Lawall
Date: Tue, 20 Jul 2010 20:08:59 -0600
Subject: drivers/block: use memdup_user
Use memdup_user when user data is immediately copied into the
allocated region. Some checkpatch cleanups in nearby code.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
//
@@
expression from,to,size,flag;
position p;
identifier l1,l2;
@@
- to = \(kmalloc@p\|kzalloc@p\)(size,flag);
+ to = memdup_user(from,size);
if (
- to==NULL
+ IS_ERR(to)
|| ...) {
<+... when != goto l1;
- -ENOMEM
+ PTR_ERR(to)
...+>
}
- if (copy_from_user(to, from, size) != 0) {
- <+... when != goto l2;
- -EFAULT
- ...+>
- }
//
Signed-off-by: Julia Lawall
Cc: Chirag Kantharia
Signed-off-by: Andrew Morton
Signed-off-by: Jens Axboe
---
drivers/block/cpqarray.c | 32 ++++++++++----------------------
1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/drivers/block/cpqarray.c b/drivers/block/cpqarray.c
index 28937b661564..9473215956f9 100644
--- a/drivers/block/cpqarray.c
+++ b/drivers/block/cpqarray.c
@@ -1255,17 +1255,11 @@ static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
/* Pre submit processing */
switch(io->cmd) {
case PASSTHRU_A:
- p = kmalloc(io->sg[0].size, GFP_KERNEL);
- if (!p)
- {
- error = -ENOMEM;
- cmd_free(h, c, 0);
- return(error);
- }
- if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
- kfree(p);
- cmd_free(h, c, 0);
- return -EFAULT;
+ p = memdup_user(io->sg[0].addr, io->sg[0].size);
+ if (IS_ERR(p)) {
+ error = PTR_ERR(p);
+ cmd_free(h, c, 0);
+ return error;
}
c->req.hdr.blk = pci_map_single(h->pci_dev, &(io->c),
sizeof(ida_ioctl_t),
@@ -1296,18 +1290,12 @@ static int ida_ctlr_ioctl(ctlr_info_t *h, int dsk, ida_ioctl_t *io)
case DIAG_PASS_THRU:
case COLLECT_BUFFER:
case WRITE_FLASH_ROM:
- p = kmalloc(io->sg[0].size, GFP_KERNEL);
- if (!p)
- {
- error = -ENOMEM;
- cmd_free(h, c, 0);
- return(error);
+ p = memdup_user(io->sg[0].addr, io->sg[0].size);
+ if (IS_ERR(p)) {
+ error = PTR_ERR(p);
+ cmd_free(h, c, 0);
+ return error;
}
- if (copy_from_user(p, io->sg[0].addr, io->sg[0].size)) {
- kfree(p);
- cmd_free(h, c, 0);
- return -EFAULT;
- }
c->req.sg[0].size = io->sg[0].size;
c->req.sg[0].addr = pci_map_single(h->pci_dev, p,
c->req.sg[0].size, PCI_DMA_BIDIRECTIONAL);
--
cgit v1.2.3-55-g7522