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| author | Felipe F. Tonello <eu@felipetonello.com> | 2016-08-08 21:30:06 +0100 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2016-08-25 12:13:14 +0300 |
| commit | e0466156ee2e944fb47a3fa00932c3698a6d2c67 (patch) | |
| tree | f947729434d5042df8ebeb2ca86def77ec67fa9f /drivers/usb/gadget/u_f.c | |
| parent | 69bb99738b5c6d56d2b1a75db9cbb4d187453c1a (diff) | |
| download | linux-e0466156ee2e944fb47a3fa00932c3698a6d2c67.tar.bz2 | |
usb: gadget: align buffer size when allocating for OUT endpoint
Using usb_ep_align() makes sure that the buffer size for OUT endpoints is
always aligned with wMaxPacketSize (512 usually). This makes sure
that no buffer has the wrong size, which can cause nasty bugs.
Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/gadget/u_f.c')
| -rw-r--r-- | drivers/usb/gadget/u_f.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c index 6811761fec64..907f8144813c 100644 --- a/drivers/usb/gadget/u_f.c +++ b/drivers/usb/gadget/u_f.c @@ -12,6 +12,7 @@ */ #include "u_f.h" +#include <linux/usb/ch9.h> struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len, int default_len) { @@ -20,6 +21,8 @@ struct usb_request *alloc_ep_req(struct usb_ep *ep, size_t len, int default_len) req = usb_ep_alloc_request(ep, GFP_ATOMIC); if (req) { req->length = len ?: default_len; + if (usb_endpoint_dir_out(ep->desc)) + req->length = usb_ep_align(ep, req->length); req->buf = kmalloc(req->length, GFP_ATOMIC); if (!req->buf) { usb_ep_free_request(ep, req); |