Hi Dan, Thank you for the patch. On Thursday 15 January 2015 00:06:35 Dan Carpenter wrote: > 1) Change "conv" an "vnoc" to "to_cpu_endian" to "to_little_endian". > 2) No need to check the "limit" because that is already handled in > kstrtoXX so delete that parameter along with the check. > 3) By using a "bits" parameter, we can combine the "uxx" parameter and > the "str2u" parameters. > 4) The kstrtou##bits() conversion does not need to be done under the > mutex so move it to the start of the function. > 5) Change the name of "identity_conv" to "noop_conversion". > > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> > --- > This file has a couple pages of Sparse endian warnings. > http://lwn.net/Articles/205624/ > It's hard to review the static checker warnings when there are so many. > > diff --git a/drivers/usb/gadget/function/uvc_configfs.c > b/drivers/usb/gadget/function/uvc_configfs.c index a0443a2..87beb8c 100644 > --- a/drivers/usb/gadget/function/uvc_configfs.c > +++ b/drivers/usb/gadget/function/uvc_configfs.c > @@ -1032,7 +1032,7 @@ static struct configfs_item_operations > uvcg_frame_item_ops = { .store_attribute = uvcg_frame_attr_store, > }; > > -#define UVCG_FRAME_ATTR(cname, aname, conv, str2u, uxx, vnoc, limit) \ > +#define UVCG_FRAME_ATTR(cname, aname, to_cpu_endian, to_little_endian, > bits) \ static ssize_t uvcg_frame_##cname##_show(struct uvcg_frame *f, char > *page)\ { \ > struct f_uvc_opts *opts; \ > @@ -1046,7 +1046,7 @@ static ssize_t uvcg_frame_##cname##_show(struct > uvcg_frame *f, char *page)\ opts = to_f_uvc_opts(opts_item); \ > \ > mutex_lock(&opts->lock); \ > - result = sprintf(page, "%d\n", conv(f->frame.cname)); \ > + result = sprintf(page, "%d\n", to_cpu_endian(f->frame.cname)); \ > mutex_unlock(&opts->lock); \ > \ > mutex_unlock(su_mutex); \ > @@ -1061,7 +1061,11 @@ static ssize_t uvcg_frame_##cname##_store(struct > uvcg_frame *f, \ struct uvcg_format *fmt; \ > struct mutex *su_mutex = &f->item.ci_group->cg_subsys->su_mutex;\ > int ret; \ > - uxx num; \ > + u##bits num; \ > + \ > + ret = kstrtou##bits(page, 0, &num); \ > + if (ret) \ > + return ret; \ > \ > mutex_lock(su_mutex); /* for navigating configfs hierarchy */ \ > \ > @@ -1075,15 +1079,7 @@ static ssize_t uvcg_frame_##cname##_store(struct > uvcg_frame *f, \ goto end; \ > } \ > \ > - ret = str2u(page, 0, &num); \ > - if (ret) \ > - goto end; \ > - \ > - if (num > limit) { \ > - ret = -EINVAL; \ > - goto end; \ > - } \ > - f->frame.cname = vnoc(num); \ > + f->frame.cname = to_little_endian(num); \ > ret = len; \ > end: \ > mutex_unlock(&opts->lock); \ > @@ -1097,24 +1093,20 @@ static struct uvcg_frame_attribute \ > uvcg_frame_##cname##_show, \ > uvcg_frame_##cname##_store) > > -#define identity_conv(x) (x) > +#define noop_conversion(x) (x) > > -UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, identity_conv, kstrtou8, > u8, - identity_conv, 0xFF); > -UVCG_FRAME_ATTR(w_width, wWidth, le16_to_cpu, kstrtou16, u16, cpu_to_le16, > - 0xFFFF); > -UVCG_FRAME_ATTR(w_height, wHeight, le16_to_cpu, kstrtou16, u16, > cpu_to_le16, - 0xFFFF); > -UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, le32_to_cpu, kstrtou32, u32, > - cpu_to_le32, 0xFFFFFFFF); > -UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, le32_to_cpu, kstrtou32, u32, > - cpu_to_le32, 0xFFFFFFFF); > +UVCG_FRAME_ATTR(bm_capabilities, bmCapabilities, noop_conversion, > + noop_conversion, 8); > +UVCG_FRAME_ATTR(w_width, wWidth, le16_to_cpu, cpu_to_le16, 16); > +UVCG_FRAME_ATTR(w_height, wHeight, le16_to_cpu, cpu_to_le16, 16); > +UVCG_FRAME_ATTR(dw_min_bit_rate, dwMinBitRate, le32_to_cpu, cpu_to_le32, > 32); +UVCG_FRAME_ATTR(dw_max_bit_rate, dwMaxBitRate, le32_to_cpu, > cpu_to_le32, 32); UVCG_FRAME_ATTR(dw_max_video_frame_buffer_size, > dwMaxVideoFrameBufferSize, - le32_to_cpu, kstrtou32, u32, cpu_to_le32, > 0xFFFFFFFF); > + le32_to_cpu, cpu_to_le32, 32); > UVCG_FRAME_ATTR(dw_default_frame_interval, dwDefaultFrameInterval, > - le32_to_cpu, kstrtou32, u32, cpu_to_le32, 0xFFFFFFFF); > + le32_to_cpu, cpu_to_le32, 32); > > -#undef identity_conv > +#undef noop_conversion > > #undef UVCG_FRAME_ATTR -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
