diff options
| author | Oliver Neukum <oneukum@suse.com> | 2022-05-12 16:03:21 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2022-06-20 12:30:33 +0300 |
| commit | 8332f75a5bd456ccc24d3ef7fb676ecae54a9cb8 (patch) | |
| tree | 8c6c4e159b932721ad08e002cd4dded011901841 /drivers/media/rc | |
| parent | 0189ef82722894bc8c9361f90f18577977d58ef4 (diff) | |
| download | linux-8332f75a5bd456ccc24d3ef7fb676ecae54a9cb8.tar.xz | |
media: imon_raw: respect DMA coherency
No buffer can be embedded inside a descriptor, not even a simple be64.
Use a separate kmalloc()
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/rc')
| -rw-r--r-- | drivers/media/rc/imon_raw.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/media/rc/imon_raw.c b/drivers/media/rc/imon_raw.c index d41580f6e4c7..b02ded52f19e 100644 --- a/drivers/media/rc/imon_raw.c +++ b/drivers/media/rc/imon_raw.c @@ -14,7 +14,7 @@ struct imon { struct device *dev; struct urb *ir_urb; struct rc_dev *rcdev; - __be64 ir_buf; + __be64 *ir_buf; char phys[64]; }; @@ -29,7 +29,7 @@ struct imon { static void imon_ir_data(struct imon *imon) { struct ir_raw_event rawir = {}; - u64 data = be64_to_cpu(imon->ir_buf); + u64 data = be64_to_cpup(imon->ir_buf); u8 packet_no = data & 0xff; int offset = 40; int bit; @@ -37,7 +37,7 @@ static void imon_ir_data(struct imon *imon) if (packet_no == 0xff) return; - dev_dbg(imon->dev, "data: %*ph", 8, &imon->ir_buf); + dev_dbg(imon->dev, "data: %*ph", 8, imon->ir_buf); /* * Only the first 5 bytes contain IR data. Right shift so we move @@ -137,10 +137,16 @@ static int imon_probe(struct usb_interface *intf, if (!imon->ir_urb) return -ENOMEM; + imon->ir_buf = kmalloc(sizeof(__be64), GFP_KERNEL); + if (!imon->ir_buf) { + ret = -ENOMEM; + goto free_urb; + } + imon->dev = &intf->dev; usb_fill_int_urb(imon->ir_urb, udev, usb_rcvintpipe(udev, ir_ep->bEndpointAddress), - &imon->ir_buf, sizeof(imon->ir_buf), + imon->ir_buf, sizeof(__be64), imon_ir_rx, imon, ir_ep->bInterval); rcdev = devm_rc_allocate_device(&intf->dev, RC_DRIVER_IR_RAW); @@ -177,6 +183,7 @@ static int imon_probe(struct usb_interface *intf, free_urb: usb_free_urb(imon->ir_urb); + kfree(imon->ir_buf); return ret; } @@ -186,6 +193,7 @@ static void imon_disconnect(struct usb_interface *intf) usb_kill_urb(imon->ir_urb); usb_free_urb(imon->ir_urb); + kfree(imon->ir_buf); } static const struct usb_device_id imon_table[] = { |