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x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump
authorTianyu Lan <Tianyu.Lan@microsoft.com>
Mon, 6 Apr 2020 15:53:27 +0000 (08:53 -0700)
committerWei Liu <wei.liu@kernel.org>
Fri, 10 Apr 2020 14:29:00 +0000 (15:29 +0100)
commit7f11a2cc10a4ae3a70e2c73361f4a9a33503539b
tree5c799e18df8d2d4c9a14c65e5e1704231aefaca8
parent74347a99e73ae00b8385f1209aaea193c670f901
x86/Hyper-V: Free hv_panic_page when fail to register kmsg dump

If kmsg_dump_register() fails, hv_panic_page will not be used
anywhere.  So free and reset it.

Fixes: 81b18bce48af ("Drivers: HV: Send one page worth of kmsg dump over Hyper-V during panic")
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20200406155331.2105-3-Tianyu.Lan@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
drivers/hv/vmbus_drv.c