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usb: musb: sunxi: Explicitly release USB PHY on exit 

This fixes a kernel oops when unloading the driver due to usb_put_phy
being called after usb_phy_generic_unregister when the device is
detached. Calling usb_phy_generic_unregister causes x->dev->driver to
be NULL in usb_put_phy and results in a NULL pointer dereference.

Cc: stable@vger.kernel.org # v4.3+
Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jonathan Liu 2017-10-09 22:46:13 -05:00 committed by Greg Kroah-Hartman
parent 445ef61543
commit 6ed05c68cb
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/musb/sunxi.c
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@ -297,6 +297,8 @@ static int sunxi_musb_exit(struct musb *musb)
if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags))
sunxi_sram_release(musb->controller->parent); sunxi_sram_release(musb->controller->parent);
devm_usb_put_phy(glue->dev, glue->xceiv);
return 0; return 0;
} }