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Message-ID: <e8e73fcc-b902-4972-6001-84671361146d@datenfreihafen.org> Date: Tue, 4 Jan 2022 19:04:58 +0100 From: Stefan Schmidt <stefan@...enfreihafen.org> To: Pavel Skripkin <paskripkin@...il.com>, alex.aring@...il.com, davem@...emloft.net, kuba@...nel.org Cc: linux-wpan@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Alexander Potapenko <glider@...gle.com> Subject: Re: [PATCH v2] ieee802154: atusb: fix uninit value in atusb_set_extended_addr Hello. On 04.01.22 18:27, Pavel Skripkin wrote: > On 1/4/22 18:40, Stefan Schmidt wrote: >> >> It compiles, but does not work on the real hardware. >> >> [ 1.114698] usb 1-1: new full-speed USB device number 2 using uhci_hcd >> [ 1.261691] usb 1-1: New USB device found, idVendor=20b7, >> idProduct=1540, bcdDevice= 0.01 >> [ 1.263421] usb 1-1: New USB device strings: Mfr=0, Product=0, >> SerialNumber=1 >> [ 1.264952] usb 1-1: SerialNumber: 4630333438371502231a >> [ 1.278042] usb 1-1: ATUSB: AT86RF231 version 2 >> [ 1.281087] usb 1-1: Firmware: major: 0, minor: 3, hardware type: >> ATUSB (2) >> [ 1.285191] usb 1-1: atusb_control_msg: req 0x01 val 0x0 idx 0x0, >> error -61 >> [ 1.286903] usb 1-1: failed to fetch extended address, random >> address set >> [ 1.288757] usb 1-1: atusb_probe: initialization failed, error = -61 >> [ 1.290922] atusb: probe of 1-1:1.0 failed with error -61 >> >> >> Without your patch it works as expected: >> >> [ 1.091925] usb 1-1: new full-speed USB device number 2 using uhci_hcd >> [ 1.237743] usb 1-1: New USB device found, idVendor=20b7, >> idProduct=1540, bcdDevice= 0.01 >> [ 1.239788] usb 1-1: New USB device strings: Mfr=0, Product=0, >> SerialNumber=1 >> [ 1.241432] usb 1-1: SerialNumber: 4630333438371502231a >> [ 1.255012] usb 1-1: ATUSB: AT86RF231 version 2 >> [ 1.258073] usb 1-1: Firmware: major: 0, minor: 3, hardware type: >> ATUSB (2) >> [ 1.262170] usb 1-1: Firmware: build #132 Mo 28. Nov 16:20:35 CET 2016 >> [ 1.266195] usb 1-1: Read permanent extended address >> 10:e2:d5:ff:ff:00:02:e8 from device >> > > Hi Stefan, > > thanks for testing on real hw. > > It looks like there is corner case, that Greg mentioned in this thread. > atusb_get_and_show_build() reads firmware build info, which may have > various length. > > Maybe we can change atusb_control_msg() to usb_control_msg() in > atusb_get_and_show_build(), since other callers do not have this problem That works for me. I will also have a look at the use of the modern USB API for next. The fix here has a higher prio for me to get in and backported though. Once we have this we can look at bigger changes in atusb. regards Stefan Schmidt
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