diff options
| author |   Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2017-04-06 05:49:02 +0200 |
|---|---|---|
| committer |   Samuel Ortiz <sameo@linux.intel.com> | 2017-04-17 00:33:31 +0200 |
| commit | 8b55d7581fc5dccc658b9a169879c46dda807d5e (patch) | |
| tree | 72b9489752305c2e66ca68a0e34f9f1e654840f7 /drivers/nfc/pn533 | |
| parent | NFC: trf7970a: Add device tree option of 1.8 Volt IO voltage (diff) | |
| download | linux-dev-8b55d7581fc5dccc658b9a169879c46dda807d5e.tar.xz linux-dev-8b55d7581fc5dccc658b9a169879c46dda807d5e.zip | |
NFC: pn533: use constant off-stack buffer for sending acks
fix for WARN:
usb 3-2.4.1: NFC: Exchanging data failed (error 0x13)
llcp: nfc_llcp_recv: err -5
llcp: nfc_llcp_symm_timer: SYMM timeout
------------[ cut here ]------------
WARNING: CPU: 1 PID: 26397 at .../drivers/usb/core/hcd.c:1584 usb_hcd_map_urb_for_dma+0x370/0x550
transfer buffer not dma capable
[...]
Workqueue: events nfc_llcp_timeout_work [nfc]
Call Trace:
? dump_stack+0x46/0x5a
? __warn+0xb9/0xe0
? warn_slowpath_fmt+0x5a/0x80
? usb_hcd_map_urb_for_dma+0x370/0x550
? usb_hcd_submit_urb+0x2fb/0xa60
? dequeue_entity+0x3f2/0xc30
? pn533_usb_send_ack+0x5d/0x80 [pn533_usb]
? pn533_usb_abort_cmd+0x13/0x20 [pn533_usb]
? pn533_dep_link_down+0x32/0x70 [pn533]
? nfc_dep_link_down+0x87/0xd0 [nfc]
[...]
usb 3-2.4.1: NFC: Exchanging data failed (error 0x13)
llcp: nfc_llcp_recv: err -5
llcp: nfc_llcp_symm_timer: SYMM timeout
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc/pn533')
| -rw-r--r-- | drivers/nfc/pn533/i2c.c | 2 | ||||
| -rw-r--r-- | drivers/nfc/pn533/usb.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/nfc/pn533/i2c.c b/drivers/nfc/pn533/i2c.c index 2c2fb9cfe10a..8f60ce039b0d 100644 --- a/drivers/nfc/pn533/i2c.c +++ b/drivers/nfc/pn533/i2c.c @@ -51,7 +51,7 @@ static int pn533_i2c_send_ack(struct pn533 *dev, gfp_t flags) { struct pn533_i2c_phy *phy = dev->phy; struct i2c_client *client = phy->i2c_dev; - u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; + static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; /* spec 6.2.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ int rc; diff --git a/drivers/nfc/pn533/usb.c b/drivers/nfc/pn533/usb.c index 000159ea9c5f..8ed203ea21ea 100644 --- a/drivers/nfc/pn533/usb.c +++ b/drivers/nfc/pn533/usb.c @@ -148,11 +148,11 @@ static int pn533_submit_urb_for_ack(struct pn533_usb_phy *phy, gfp_t flags) static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags) { struct pn533_usb_phy *phy = dev->phy; - u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; + static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ int rc; - phy->out_urb->transfer_buffer = ack; + phy->out_urb->transfer_buffer = (u8 *)ack; phy->out_urb->transfer_buffer_length = sizeof(ack); rc = usb_submit_urb(phy->out_urb, flags); |