Re: [PATCH] usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2021-06-03 18:21:44
Also in:
linux-arm-kernel, linux-usb, lkml
On Tue, Jun 1, 2021 at 10:49 AM Neil Armstrong [off-list ref] wrote:
When only PHY1 is used (for example on Odroid-HC4), the regmap init code
uses the usb2 ports when doesn't initialize the PHY1 regmap entry.
This fixes:
Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020
...
pc : regmap_update_bits_base+0x40/0xa0
lr : dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8
...
Call trace:
regmap_update_bits_base+0x40/0xa0
dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8
dwc3_meson_g12a_usb2_init+0x7c/0xc8
dwc3_meson_g12a_usb_init+0x28/0x48
dwc3_meson_g12a_probe+0x298/0x540
platform_probe+0x70/0xe0
really_probe+0xf0/0x4d8
driver_probe_device+0xfc/0x168
...
Fixes: 013af227f58a97 ("usb: dwc3: meson-g12a: handle the phy and glue registers separately")
Signed-off-by: Neil Armstrong <redacted>Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic