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usb: Add error log to help debugging

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Change-Id: Id320dc2b85f0a48a8f81425468aa3229b1e7d0cb
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
This commit is contained in:
Andrei Emeltchenko 2016-08-08 15:18:50 +03:00 • committed by Inaky Perez-Gonzalez
commit ecdcbe5077
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/device/usb_dc_dw.c
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@ -948,21 +948,25 @@ int usb_dc_ep_read(const uint8_t ep, uint8_t *const data,
uint32_t i, j, data_len, bytes_to_copy;
if (!usb_dw_ctrl.attached && !usb_dw_ep_is_valid(ep)) {
SYS_LOG_ERR("No valid endpoint");
return -EINVAL;
}
/* Check if OUT ep */
if (USB_DW_EP_ADDR2DIR(ep) != USB_EP_DIR_OUT) {
SYS_LOG_ERR("Wrong endpoint direction");
return -EINVAL;
}
/* Allow to read 0 bytes */
if (!data && max_data_len) {
SYS_LOG_ERR("Wrong arguments");
return -EINVAL;
}
/* Check if ep enabled */
if (!usb_dw_ep_is_enabled(ep)) {
SYS_LOG_ERR("Not enabled endpoint");
return -EINVAL;
}