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SubjectRE: [PATCH v2 5/5] usb:cdns3 Add Cadence USB3 DRD Driver
Date
Hi

I can't recreate these issue on my environment. I use gcc (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0. Maybe there are some differenct between these two compilers.

Do you have any idea how I should change this fragment of code:
sprintf(str, "%02x %02x %02x %02x %02x %02x %02x %02x",
bRequestType, bRequest,
cpu_to_le16(wValue) & 0xff,
cpu_to_le16(wValue) >> 8,
cpu_to_le16(wIndex) & 0xff,
cpu_to_le16(wIndex) >> 8,
cpu_to_le16(wLength) & 0xff,
cpu_to_le16(wLength) >> 8);

to remove "restricted __le16 degrades to integer" warnings ?

Maybe I should cast all to u8. Then this code will look like:
sprintf(str, "%02x %02x %02x %02x %02x %02x %02x %02x",
bRequestType, bRequest,
(u8)(cpu_to_le16(wValue) & 0xff),
(u8)(cpu_to_le16(wValue) >> 8),
(u8)(cpu_to_le16(wIndex) & 0xff),
(u8)(cpu_to_le16(wIndex) >> 8),
(u8)(cpu_to_le16(wLength) & 0xff),
(u8)(cpu_to_le16(wLength) >> 8));

Should it Fix these warnings ?

Cheers,
Pawel

>Thank you for the patch! Perhaps something to improve:
>
>
>
>[auto build test WARNING on usb/usb-testing]
>
>[also build test WARNING on v4.20-rc7 next-20181221]
>
>[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>
>
>
>url: https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_0day-2Dci_linux_commits_Pawel-2DLaszczak_Introduced-
>2Dnew-2DCadence-2DUSBSS-2DDRD-2DDriver_20181223-2D231813&d=DwIBAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ-
>_haXqY&r=e1OgxfvkL0qo9XO6fX1gscva-w03uSYC1nIyxl89-rI&m=JS8MUBEUPN46-me57xUY-
>7hoBbSrlgd2SCB9ahNjK4s&s=bhpHqRyEtMdMbWdGoBqQ9Pz9wq7pRA7-OohrGik3BpM&e=
>
>base: https://urldefense.proofpoint.com/v2/url?u=https-
>3A__git.kernel.org_pub_scm_linux_kernel_git_gregkh_usb.git&d=DwIBAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ-
>_haXqY&r=e1OgxfvkL0qo9XO6fX1gscva-w03uSYC1nIyxl89-rI&m=JS8MUBEUPN46-me57xUY-
>7hoBbSrlgd2SCB9ahNjK4s&s=Vf__lGpV27zdf1egowm9p8YBJjz9aMmgbi8nW_Z_DLk&e= usb-testing
>
>config: x86_64-allmodconfig (attached as .config)
>
>compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
>
>reproduce:
>
> # save the attached .config to linux build tree
>
> make ARCH=x86_64
>
>
>
>All warnings (new ones prefixed by >>):
>
>
>
>>> drivers/usb/common/debug.c:253:25: warning: restricted __le16 degrades to integer
>
> drivers/usb/common/debug.c:254:25: warning: restricted __le16 degrades to integer
>
> drivers/usb/common/debug.c:255:25: warning: restricted __le16 degrades to integer
>
> drivers/usb/common/debug.c:256:25: warning: restricted __le16 degrades to integer
>
> drivers/usb/common/debug.c:257:25: warning: restricted __le16 degrades to integer
>
> drivers/usb/common/debug.c:258:25: warning: restricted __le16 degrades to integer
>
>
>
>vim +253 drivers/usb/common/debug.c
>
>
>
>cefb8b21 Pawel Laszczak 2018-12-23 205
>
>cefb8b21 Pawel Laszczak 2018-12-23 206 /**
>
>cefb8b21 Pawel Laszczak 2018-12-23 207 * usb_decode_ctrl - returns a string representation of ctrl request
>
>cefb8b21 Pawel Laszczak 2018-12-23 208 */
>
>cefb8b21 Pawel Laszczak 2018-12-23 209 const char *usb_decode_ctrl(char *str, __u8 bRequestType, __u8 bRequest,
>
>cefb8b21 Pawel Laszczak 2018-12-23 210 __u16 wValue, __u16 wIndex, __u16 wLength)
>
>cefb8b21 Pawel Laszczak 2018-12-23 211 {
>
>cefb8b21 Pawel Laszczak 2018-12-23 212 switch (bRequest) {
>
>cefb8b21 Pawel Laszczak 2018-12-23 213 case USB_REQ_GET_STATUS:
>
>cefb8b21 Pawel Laszczak 2018-12-23 214 usb_decode_get_status(bRequestType, wIndex, wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 215 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 216 case USB_REQ_CLEAR_FEATURE:
>
>cefb8b21 Pawel Laszczak 2018-12-23 217 case USB_REQ_SET_FEATURE:
>
>cefb8b21 Pawel Laszczak 2018-12-23 218 usb_decode_set_clear_feature(bRequestType, bRequest, wValue,
>
>cefb8b21 Pawel Laszczak 2018-12-23 219 wIndex, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 220 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 221 case USB_REQ_SET_ADDRESS:
>
>cefb8b21 Pawel Laszczak 2018-12-23 222 usb_decode_set_address(wValue, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 223 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 224 case USB_REQ_GET_DESCRIPTOR:
>
>cefb8b21 Pawel Laszczak 2018-12-23 225 case USB_REQ_SET_DESCRIPTOR:
>
>cefb8b21 Pawel Laszczak 2018-12-23 226 usb_decode_get_set_descriptor(bRequestType, bRequest, wValue,
>
>cefb8b21 Pawel Laszczak 2018-12-23 227 wIndex, wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 228 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 229 case USB_REQ_GET_CONFIGURATION:
>
>cefb8b21 Pawel Laszczak 2018-12-23 230 usb_decode_get_configuration(wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 231 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 232 case USB_REQ_SET_CONFIGURATION:
>
>cefb8b21 Pawel Laszczak 2018-12-23 233 usb_decode_set_configuration(wValue, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 234 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 235 case USB_REQ_GET_INTERFACE:
>
>cefb8b21 Pawel Laszczak 2018-12-23 236 usb_decode_get_intf(wIndex, wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 237 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 238 case USB_REQ_SET_INTERFACE:
>
>cefb8b21 Pawel Laszczak 2018-12-23 239 usb_decode_set_intf(wValue, wIndex, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 240 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 241 case USB_REQ_SYNCH_FRAME:
>
>cefb8b21 Pawel Laszczak 2018-12-23 242 usb_decode_synch_frame(wIndex, wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 243 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 244 case USB_REQ_SET_SEL:
>
>cefb8b21 Pawel Laszczak 2018-12-23 245 usb_decode_set_sel(wLength, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 246 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 247 case USB_REQ_SET_ISOCH_DELAY:
>
>cefb8b21 Pawel Laszczak 2018-12-23 248 usb_decode_set_isoch_delay(wValue, str);
>
>cefb8b21 Pawel Laszczak 2018-12-23 249 break;
>
>cefb8b21 Pawel Laszczak 2018-12-23 250 default:
>
>cefb8b21 Pawel Laszczak 2018-12-23 251 sprintf(str, "%02x %02x %02x %02x %02x %02x %02x %02x",
>
>cefb8b21 Pawel Laszczak 2018-12-23 252 bRequestType, bRequest,
>
>cefb8b21 Pawel Laszczak 2018-12-23 @253 cpu_to_le16(wValue) & 0xff,
>
>cefb8b21 Pawel Laszczak 2018-12-23 254 cpu_to_le16(wValue) >> 8,
>
>cefb8b21 Pawel Laszczak 2018-12-23 255 cpu_to_le16(wIndex) & 0xff,
>
>cefb8b21 Pawel Laszczak 2018-12-23 256 cpu_to_le16(wIndex) >> 8,
>
>cefb8b21 Pawel Laszczak 2018-12-23 257 cpu_to_le16(wLength) & 0xff,
>
>cefb8b21 Pawel Laszczak 2018-12-23 258 cpu_to_le16(wLength) >> 8);
>
>cefb8b21 Pawel Laszczak 2018-12-23 259 }
>
>cefb8b21 Pawel Laszczak 2018-12-23 260
>
>cefb8b21 Pawel Laszczak 2018-12-23 261 return str;
>
>cefb8b21 Pawel Laszczak 2018-12-23 262 }
>
>cefb8b21 Pawel Laszczak 2018-12-23 263 EXPORT_SYMBOL_GPL(usb_decode_ctrl);
>
>cefb8b21 Pawel Laszczak 2018-12-23 264
>
>
>
>:::::: The code at line 253 was first introduced by commit
>
>:::::: cefb8b2176410ef0aacc22411a64f8a157612f14 usb:common Separated decoding functions from dwc3 driver.
>
>
>
>:::::: TO: Pawel Laszczak <pawell@cadence.com>
>
>:::::: CC: 0day robot <lkp@intel.com>
>
>
>
>---
>
>0-DAY kernel test infrastructure Open Source Technology Center
>
>https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.01.org_pipermail_kbuild-
>2Dall&d=DwIBAg&c=aUq983L2pue2FqKFoP6PGHMJQyoJ7kl3s3GZ-_haXqY&r=e1OgxfvkL0qo9XO6fX1gscva-w03uSYC1nIyxl89-
>rI&m=JS8MUBEUPN46-me57xUY-7hoBbSrlgd2SCB9ahNjK4s&s=7vN3rhLkFNcUQ6jriRP_jESizA-Wm6VxtiGb8qhTKqU&e= Intel
>Corporation

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