* [PATCH] nfc: fix get_unaligned_...() misuses
@ 2017-04-06 16:48 Al Viro
2017-04-06 16:58 ` Al Viro
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: Al Viro @ 2017-04-06 16:48 UTC (permalink / raw)
To: Lauro Ramos Venancio; +Cc: linux-kernel, linux-wireless
* use unaligned.h, not unaligned/access_ok.h
* if a local variable of type uint16_t is unaligned, your compiler is FUBAR
* the whole point of get_unaligned_... is to avoid memcpy + ..._to_cpu().
Using it *after* memcpy() (into aligned object, no less) is pointless.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/nfc/nfcmrvl/fw_dnld.c b/drivers/nfc/nfcmrvl/fw_dnld.c
index f8dcdf4b24f6..d3b04da0f16f 100644
--- a/drivers/nfc/nfcmrvl/fw_dnld.c
+++ b/drivers/nfc/nfcmrvl/fw_dnld.c
@@ -17,7 +17,7 @@
*/
#include <linux/module.h>
-#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
@@ -281,12 +281,11 @@ static int process_state_fw_dnld(struct nfcmrvl_private *priv,
return -EINVAL;
}
skb_pull(skb, 1);
- memcpy(&len, skb->data, 2);
+ len = get_unaligned_le16(skb->data);
skb_pull(skb, 2);
+ comp_len = get_unaligned_le16(skb->data);
memcpy(&comp_len, skb->data, 2);
skb_pull(skb, 2);
- len = get_unaligned_le16(&len);
- comp_len = get_unaligned_le16(&comp_len);
if (((~len) & 0xFFFF) != comp_len) {
nfc_err(priv->dev, "bad len complement: %x %x %x",
len, comp_len, (~len & 0xFFFF));
diff --git a/drivers/nfc/nxp-nci/firmware.c b/drivers/nfc/nxp-nci/firmware.c
index 5291797324ba..f27b03e3b5ae 100644
--- a/drivers/nfc/nxp-nci/firmware.c
+++ b/drivers/nfc/nxp-nci/firmware.c
@@ -24,7 +24,7 @@
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
-#include <linux/unaligned/access_ok.h>
+#include <linux/unaligned.h>
#include "nxp-nci.h"
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
index 36099e557730..9da35d2898fc 100644
--- a/drivers/nfc/nxp-nci/i2c.c
+++ b/drivers/nfc/nxp-nci/i2c.c
@@ -36,7 +36,6 @@
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/platform_data/nxp-nci.h>
-#include <linux/unaligned/access_ok.h>
#include <net/nfc/nfc.h>
@@ -127,7 +126,7 @@ static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy,
goto fw_read_exit;
}
- frame_len = (get_unaligned_be16(&header) & NXP_NCI_FW_FRAME_LEN_MASK) +
+ frame_len = (be16_to_cpu(header) & NXP_NCI_FW_FRAME_LEN_MASK) +
NXP_NCI_FW_CRC_LEN;
*skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL);
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] nfc: fix get_unaligned_...() misuses
2017-04-06 16:48 [PATCH] nfc: fix get_unaligned_...() misuses Al Viro
@ 2017-04-06 16:58 ` Al Viro
2017-04-16 22:45 ` Samuel Ortiz
2017-04-07 7:01 ` kbuild test robot
2017-04-07 7:28 ` kbuild test robot
2 siblings, 1 reply; 5+ messages in thread
From: Al Viro @ 2017-04-06 16:58 UTC (permalink / raw)
To: Lauro Ramos Venancio; +Cc: linux-kernel, linux-wireless, Samuel Ortiz
On Thu, Apr 06, 2017 at 05:48:47PM +0100, Al Viro wrote:
> * use unaligned.h, not unaligned/access_ok.h
... which got misspelled in that patch, sorry... Fixed variant follows:
commit b3e79ba1708c9b74781079c9f8617448fce36b51
Author: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu Apr 6 12:42:14 2017 -0400
nfc: fix get_unaligned_...() misuses
* use unaligned.h, not unaligned/access_ok.h
* if a local variable of type uint16_t is unaligned, your compiler is FUBAR
* the whole point of get_unaligned_... is to avoid memcpy + ..._to_cpu().
Using it *after* memcpy() (into aligned object, no less) is pointless.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/drivers/nfc/nfcmrvl/fw_dnld.c b/drivers/nfc/nfcmrvl/fw_dnld.c
index f8dcdf4b24f6..ad1f0624ceee 100644
--- a/drivers/nfc/nfcmrvl/fw_dnld.c
+++ b/drivers/nfc/nfcmrvl/fw_dnld.c
@@ -17,11 +17,11 @@
*/
#include <linux/module.h>
-#include <linux/unaligned/access_ok.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
+#include <asm/unaligned.h>
#include "nfcmrvl.h"
#define FW_DNLD_TIMEOUT 15000
@@ -281,12 +281,11 @@ static int process_state_fw_dnld(struct nfcmrvl_private *priv,
return -EINVAL;
}
skb_pull(skb, 1);
- memcpy(&len, skb->data, 2);
+ len = get_unaligned_le16(skb->data);
skb_pull(skb, 2);
+ comp_len = get_unaligned_le16(skb->data);
memcpy(&comp_len, skb->data, 2);
skb_pull(skb, 2);
- len = get_unaligned_le16(&len);
- comp_len = get_unaligned_le16(&comp_len);
if (((~len) & 0xFFFF) != comp_len) {
nfc_err(priv->dev, "bad len complement: %x %x %x",
len, comp_len, (~len & 0xFFFF));
diff --git a/drivers/nfc/nxp-nci/firmware.c b/drivers/nfc/nxp-nci/firmware.c
index 5291797324ba..553011f58339 100644
--- a/drivers/nfc/nxp-nci/firmware.c
+++ b/drivers/nfc/nxp-nci/firmware.c
@@ -24,7 +24,7 @@
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
-#include <linux/unaligned/access_ok.h>
+#include <asm/unaligned.h>
#include "nxp-nci.h"
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
index 36099e557730..9da35d2898fc 100644
--- a/drivers/nfc/nxp-nci/i2c.c
+++ b/drivers/nfc/nxp-nci/i2c.c
@@ -36,7 +36,6 @@
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/platform_data/nxp-nci.h>
-#include <linux/unaligned/access_ok.h>
#include <net/nfc/nfc.h>
@@ -127,7 +126,7 @@ static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy,
goto fw_read_exit;
}
- frame_len = (get_unaligned_be16(&header) & NXP_NCI_FW_FRAME_LEN_MASK) +
+ frame_len = (be16_to_cpu(header) & NXP_NCI_FW_FRAME_LEN_MASK) +
NXP_NCI_FW_CRC_LEN;
*skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL);
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] nfc: fix get_unaligned_...() misuses
2017-04-06 16:48 [PATCH] nfc: fix get_unaligned_...() misuses Al Viro
2017-04-06 16:58 ` Al Viro
@ 2017-04-07 7:01 ` kbuild test robot
2017-04-07 7:28 ` kbuild test robot
2 siblings, 0 replies; 5+ messages in thread
From: kbuild test robot @ 2017-04-07 7:01 UTC (permalink / raw)
To: Al Viro; +Cc: kbuild-all, Lauro Ramos Venancio, linux-kernel, linux-wireless
[-- Attachment #1: Type: text/plain, Size: 1205 bytes --]
Hi Al,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc5 next-20170406]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Al-Viro/nfc-fix-get_unaligned_-misuses/20170407-123722
config: i386-allmodconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
>> drivers/nfc/nxp-nci/firmware.c:27:29: fatal error: linux/unaligned.h: No such file or directory
#include <linux/unaligned.h>
^
compilation terminated.
vim +27 drivers/nfc/nxp-nci/firmware.c
21 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include <linux/completion.h>
25 #include <linux/firmware.h>
26 #include <linux/nfc.h>
> 27 #include <linux/unaligned.h>
28
29 #include "nxp-nci.h"
30
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 59000 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] nfc: fix get_unaligned_...() misuses
2017-04-06 16:48 [PATCH] nfc: fix get_unaligned_...() misuses Al Viro
2017-04-06 16:58 ` Al Viro
2017-04-07 7:01 ` kbuild test robot
@ 2017-04-07 7:28 ` kbuild test robot
2 siblings, 0 replies; 5+ messages in thread
From: kbuild test robot @ 2017-04-07 7:28 UTC (permalink / raw)
To: Al Viro; +Cc: kbuild-all, Lauro Ramos Venancio, linux-kernel, linux-wireless
[-- Attachment #1: Type: text/plain, Size: 1402 bytes --]
Hi Al,
[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc5 next-20170406]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Al-Viro/nfc-fix-get_unaligned_-misuses/20170407-123722
config: x86_64-randconfig-a0-04071419 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
All errors (new ones prefixed by >>):
>> drivers/nfc//nfcmrvl/fw_dnld.c:20:29: error: linux/unaligned.h: No such file or directory
drivers/nfc//nfcmrvl/fw_dnld.c: In function 'process_state_fw_dnld':
>> drivers/nfc//nfcmrvl/fw_dnld.c:284: error: implicit declaration of function 'get_unaligned_le16'
vim +/get_unaligned_le16 +284 drivers/nfc//nfcmrvl/fw_dnld.c
278 skb_pull(skb, 3);
279 if (skb->data[0] != HELPER_CMD_PACKET_FORMAT || skb->len != 5) {
280 nfc_err(priv->dev, "bad command");
281 return -EINVAL;
282 }
283 skb_pull(skb, 1);
> 284 len = get_unaligned_le16(skb->data);
285 skb_pull(skb, 2);
286 comp_len = get_unaligned_le16(skb->data);
287 memcpy(&comp_len, skb->data, 2);
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 29945 bytes --]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] nfc: fix get_unaligned_...() misuses
2017-04-06 16:58 ` Al Viro
@ 2017-04-16 22:45 ` Samuel Ortiz
0 siblings, 0 replies; 5+ messages in thread
From: Samuel Ortiz @ 2017-04-16 22:45 UTC (permalink / raw)
To: Al Viro; +Cc: linux-kernel, linux-wireless
On Thu, Apr 06, 2017 at 05:58:59PM +0100, Al Viro wrote:
> On Thu, Apr 06, 2017 at 05:48:47PM +0100, Al Viro wrote:
> > * use unaligned.h, not unaligned/access_ok.h
>
> ... which got misspelled in that patch, sorry... Fixed variant follows:
>
> commit b3e79ba1708c9b74781079c9f8617448fce36b51
> Author: Al Viro <viro@zeniv.linux.org.uk>
> Date: Thu Apr 6 12:42:14 2017 -0400
>
> nfc: fix get_unaligned_...() misuses
>
> * use unaligned.h, not unaligned/access_ok.h
> * if a local variable of type uint16_t is unaligned, your compiler is FUBAR
> * the whole point of get_unaligned_... is to avoid memcpy + ..._to_cpu().
> Using it *after* memcpy() (into aligned object, no less) is pointless.
>
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Partly applied to nfc-next. The unaligned/access_ok.h replacements were
already applied.
Cheers,
Samuel.
^ permalink raw reply [flat|nested] 5+ messages in thread
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2017-04-06 16:48 [PATCH] nfc: fix get_unaligned_...() misuses Al Viro
2017-04-06 16:58 ` Al Viro
2017-04-16 22:45 ` Samuel Ortiz
2017-04-07 7:01 ` kbuild test robot
2017-04-07 7:28 ` kbuild test robot
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