From: "Guilherme G. Piccoli" <gpicc...@linux.vnet.ibm.com> Date: Fri, 22 Dec 2017 13:01:39 -0200
> While in recovery process of PCI error (called EEH on PowerPC arch), > another PCI transaction could be corrupted causing a situation of > nested PCI errors. Also, this scenario could be reproduced with > error injection mechanisms (for debug purposes). > > We observe that in case of nested PCI errors, bnx2x might attempt to > initialize its shmem and cause a kernel crash due to bad addresses > read from MCP. Multiple different stack traces were observed depending > on the point the second PCI error happens. > > This patch avoids the crashes by: > > * failing PCI recovery in case of nested errors (since multiple > PCI errors in a row are not expected to lead to a functional > adapter anyway), and by, > > * preventing access to adapter FW when MCP is failed (we mark it as > failed when shmem cannot get initialized properly). > > Reported-by: Abdul Haleem <abdha...@linux.vnet.ibm.com> > Signed-off-by: Guilherme G. Piccoli <gpicc...@linux.vnet.ibm.com> Applied, thank you.
