usb: chipidea: prevent endless loop registering platform_devices when probe fails
authorLothar Waßmann <LW@KARO-electronics.de>
Wed, 14 Aug 2013 09:44:01 +0000 (12:44 +0300)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 14 Aug 2013 19:34:16 +0000 (12:34 -0700)
commite98b44e90b2e8c58c5cbd921b8509e1b7b4940d3
treee94d9bc866f0f6107c9a09e8cbec57f6151a5a71
parent3b1280ca4b1743de3be04e9dd5907ec79d72483d
usb: chipidea: prevent endless loop registering platform_devices when probe fails

Commit 40dcd0e ("usb: chipidea: add PTW, PTS and STS handling") introduced
the following code to the ci_hdrc_probe() function:

+       if (!dev->of_node && dev->parent)
+               dev->of_node = dev->parent->of_node;

This inadvertently associates the ci_hdrc device with the ci_hdrc_imx
driver (which created the ci_hdrc device in the first place).

This results in ci_hdrc_imx_probe() being run for the ci_hdrc device
if ci_hdrc_probe() fails for some reason.
ci_hdrc_imx_probe() will happily create a new ci_hdrc platform_device
whose probing will likewise fail and trigger a new invocation of
ci_hdrc_imx_probe() ... ad nauseam.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Reviewed-and-tested-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/chipidea/core.c