On Wed, May 27, 2020 at 03:14:28PM +0200, Christian Gromm wrote:
> This patch adds the usb driver source file most_usb.c and
> modifies the Makefile and Kconfig accordingly.
>
> Signed-off-by: Christian Gromm <christian.gromm@xxxxxxxxxxxxx>
> ---
> v2:
> Reported-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> - don't remove usb driver from staging area
> - don't touch staging/most/Kconfig
> - remove subdirectory for USB driver and put source file into
> drivers/most
> v3:
> - submitted fixes found during code audit to staging version
> first to be able to resend single patch that adds the driver
> v4:
> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
>
> submitted patch set that fixes issues found during code audit
> to staging version first to be able to resend single patch that
> adds the driver. The patch series included:
>
> - use function sysfs_streq
> - add missing put_device calls
> - use correct error codes
> - replace code to calculate array index
> - don't use error path to exit function on success
> - move allocation of URB out of critical section
> - return 0 instead of variable
> - change return value of function drci_rd_reg
> - don't use expressions that might fail in a declaration
> - change order of function parameters
Thanks for doing this. I'm sorry that I am behind on reviewing code so
I hadn't gotten to that patchset yet.
> +static unsigned int get_stream_frame_size(struct device *dev,
> + struct most_channel_config *cfg)
> +{
> + unsigned int frame_size;
> + unsigned int sub_size = cfg->subbuffer_size;
> +
> + if (!sub_size) {
> + dev_warn(dev, "Misconfig: Subbuffer size zero.\n");
> + return 0;
> + }
> + switch (cfg->data_type) {
> + case MOST_CH_ISOC:
> + frame_size = AV_PACKETS_PER_XACT * sub_size;
> + break;
> + case MOST_CH_SYNC:
> + if (cfg->packets_per_xact == 0) {
> + dev_warn(dev, "Misconfig: Packets per XACT zero\n");
> + frame_size = 0;
> + } else if (cfg->packets_per_xact == 0xFF) {
> + frame_size = (USB_MTU / sub_size) * sub_size;
> + } else {
> + frame_size = cfg->packets_per_xact * sub_size;
> + }
> + break;
> + default:
> + dev_warn(dev, "Query frame size of non-streaming channel\n");
> + break;
frame_size isn't initialized on this path.
> + }
> + return frame_size;
> +}
regards,
dan carpenter
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