On Thu, Dec 27, 2018 at 03:05:26PM +0100, Tomislav Požega wrote: > This patch fixes following crash on Linksys EA2750 during 5GHz wifi > init: > > [ 7.955153] rt2800pci 0000:01:00.0: card - bus=0x1, slot = 0x0 irq=4 > [ 7.962259] rt2800pci 0000:01:00.0: loaded eeprom from mtd device "Factory" > [ 7.969435] ieee80211 phy0: rt2x00_set_rt: Info - RT chipset 5592, rev 0222 detected > [ 7.977348] ieee80211 phy0: rt2800_init_eeprom: Error - Invalid RF chipset 0x0000 detected > [ 7.985793] ieee80211 phy0: rt2x00lib_probe_dev: Error - Failed to allocate device > [ 7.993569] CPU 0 Unable to handle kernel paging request at virtual address 00000024, epc == 800c8f54, ra == 80249ff8 > [ 8.004408] Oops[#1]: > > Signed-off-by: Tomislav Požega <pozega.tomislav@xxxxxxxxx> > --- > drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c > index 7f813f6..86770e8 100644 > --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c > +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c > @@ -8839,6 +8839,8 @@ static int rt2800_init_eeprom(struct rt2x00_dev *rt2x00dev) > rf = RF3322; > else if (rt2x00_rt(rt2x00dev, RT5350)) > rf = RF5350; > + else if (rt2x00_rt(rt2x00dev, RT5592)) > + rf = RF5592; This looks like workaround for the crash and AFICT it is not needed on upstream code. This most likely is a issue with below openwrt patch: https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=package/kernel/mac80211/patches/rt2x00/604-rt2x00-load-eeprom-on-SoC-from-a-mtd-device-defines-.patch;h=a98b49c541f5f76e73751c2fd2e5b85559854b87;hb=HEAD which for some unknown reason set: rt2x00dev->eeprom_file = &mtd_fw; which then crash on rt2x00lib_free_eeprom_file() -> release_firmware(); Regards Stanislaw
