diff options
| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-02-18 14:21:53 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-19 14:41:38 +0100 |
| commit | 01bdf01c7ba8cfdbe205c664f0fd6f9b6f586195 (patch) | |
| tree | fc3a5093c2f64a7e6b70bf533b9add2309f5799e | |
| parent | 5ebf5c890324ffa5eaca579dac6913f3e29a28e3 (diff) | |
usb: wusbcore: wa-xfer: use struct_size() helper
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes, in particular in the
context in which this code is being used.
So, change the following form:
sizeof(*packet_desc) + (sizeof(packet_desc->PacketLength[0]) * seg->isoc_frame_count)
to :
struct_size(packet_status, PacketStatus, seg->isoc_frame_count);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/wusbcore/wa-xfer.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/drivers/usb/wusbcore/wa-xfer.c b/drivers/usb/wusbcore/wa-xfer.c index 01f2f21830c0..abf88cea37bb 100644 --- a/drivers/usb/wusbcore/wa-xfer.c +++ b/drivers/usb/wusbcore/wa-xfer.c @@ -662,9 +662,9 @@ static void __wa_setup_isoc_packet_descr( /* populate isoc packet descriptor. */ packet_desc->bPacketType = WA_XFER_ISO_PACKET_INFO; - packet_desc->wLength = cpu_to_le16(sizeof(*packet_desc) + - (sizeof(packet_desc->PacketLength[0]) * - seg->isoc_frame_count)); + packet_desc->wLength = cpu_to_le16(struct_size(packet_desc, + PacketLength, + seg->isoc_frame_count)); for (frame_index = 0; frame_index < seg->isoc_frame_count; ++frame_index) { int offset_index = frame_index + seg->isoc_frame_offset; @@ -2438,7 +2438,7 @@ static int wa_process_iso_packet_status(struct wahc *wa, struct urb *urb) struct wa_rpipe *rpipe; unsigned done = 0, dti_busy = 0, data_frame_count = 0, seg_index; unsigned first_frame_index = 0, rpipe_ready = 0; - int expected_size; + size_t expected_size; /* We have a xfer result buffer; check it */ dev_dbg(dev, "DTI: isoc packet status %d bytes at %p\n", @@ -2460,11 +2460,10 @@ static int wa_process_iso_packet_status(struct wahc *wa, struct urb *urb) goto error_bad_seg; seg = xfer->seg[wa->dti_isoc_xfer_seg]; rpipe = xfer->ep->hcpriv; - expected_size = sizeof(*packet_status) + - (sizeof(packet_status->PacketStatus[0]) * - seg->isoc_frame_count); + expected_size = struct_size(packet_status, PacketStatus, + seg->isoc_frame_count); if (urb->actual_length != expected_size) { - dev_err(dev, "DTI Error: isoc packet status--bad urb length (%d bytes vs %d needed)\n", + dev_err(dev, "DTI Error: isoc packet status--bad urb length (%d bytes vs %zu needed)\n", urb->actual_length, expected_size); goto error_bad_seg; } |