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521ca5a985
The notify_resume() callback in eeh_ops is NULL on powernv, leading to
crashes:
NIP (null)
LR eeh_report_resume+0x218/0x220
Call Trace:
eeh_report_resume+0x1f0/0x220 (unreliable)
eeh_pe_dev_traverse+0x98/0x170
eeh_handle_normal_event+0x3f4/0x650
eeh_handle_event+0x54/0x380
eeh_event_handler+0x14c/0x210
kthread+0x168/0x1b0
ret_from_kernel_thread+0x5c/0xb4
Fix it by adding a check before calling it.
Fixes: 856e1eb9bd ("PCI/AER: Add uevents in AER and EEH error/resume")
Signed-off-by: Juan J. Alvarez <jjalvare@linux.vnet.ibm.com>
Reviewed-by: Bryant G. Ly <bryantly@linux.vnet.ibm.com>
Tested-by: Carol L. Soto <clsoto@us.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Tested-by: Mauro S. M. Rodrigues <maurosr@linux.vnet.ibm.com>
Acked-by: Michael Neuling <mikey@neuling.org>
[mpe: Rewrite change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.