Warnings before patch:
files: ['drivers/net/can/at91_can.c']
Warning: drivers/net/can/at91_can.c:587 No description found for return value of 'at91_mailbox_read'
Warning: drivers/net/can/at91_can.c:587 No description found for return value of 'at91_mailbox_read'

Current warnings:
files: ['drivers/net/can/at91_can.c']
Warning: drivers/net/can/at91_can.c:587 No description found for return value of 'at91_mailbox_read'
Warning: drivers/net/can/at91_can.c:587 No description found for return value of 'at91_mailbox_read'

Warnings before: 2 after: 2