# git rev-parse -q --verify 13a83eac373c49c0a081cbcd137e79210fe78acd^{commit} 13a83eac373c49c0a081cbcd137e79210fe78acd already have revision, skipping fetch # git checkout -q -f -B kisskb 13a83eac373c49c0a081cbcd137e79210fe78acd # git clean -qxdf # < git log -1 # commit 13a83eac373c49c0a081cbcd137e79210fe78acd # Author: Michael Neuling # Date: Wed Apr 11 13:37:58 2018 +1000 # # powerpc/eeh: Fix enabling bridge MMIO windows # # On boot we save the configuration space of PCIe bridges. We do this so # when we get an EEH event and everything gets reset that we can restore # them. # # Unfortunately we save this state before we've enabled the MMIO space # on the bridges. Hence if we have to reset the bridge when we come back # MMIO is not enabled and we end up taking an PE freeze when the driver # starts accessing again. # # This patch forces the memory/MMIO and bus mastering on when restoring # bridges on EEH. Ideally we'd do this correctly by saving the # configuration space writes later, but that will have to come later in # a larger EEH rewrite. For now we have this simple fix. # # The original bug can be triggered on a boston machine by doing: # echo 0x8000000000000000 > /sys/kernel/debug/powerpc/PCI0001/err_injct_outbound # On boston, this PHB has a PCIe switch on it. Without this patch, # you'll see two EEH events, 1 expected and 1 the failure we are fixing # here. The second EEH event causes the anything under the PHB to # disappear (i.e. the i40e eth). # # With this patch, only 1 EEH event occurs and devices properly recover. # # Fixes: 652defed4875 ("powerpc/eeh: Check PCIe link after reset") # Cc: stable@vger.kernel.org # v3.11+ # Reported-by: Pridhiviraj Paidipeddi # Signed-off-by: Michael Neuling # Acked-by: Russell Currey # Signed-off-by: Michael Ellerman # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < git log --format=%s --max-count=1 13a83eac373c49c0a081cbcd137e79210fe78acd # < make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mvme5100_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- mvme5100_defconfig # make -s -j 40 ARCH=powerpc O=/kisskb/build/powerpc-fixes_mvme5100_defconfig_powerpc CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic': /kisskb/src/net/core/gen_stats.c:149:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1637:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/flow_dissector.c: In function '__skb_flow_dissect': /kisskb/src/net/core/flow_dissector.c:789:7: warning: 'vlan' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:340:21: note: 'pdeo' was declared here /kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker': /kisskb/src/lib/rhashtable.c:269:2: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:234:28: note: 'next' was declared here /kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list': /kisskb/src/net/core/dev.c:3176:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:157:15: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c: In function 'tun_get_user': /kisskb/src/drivers/net/tun.c:1827:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1537:31: warning: 'linear' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/net/tun.c:1737:46: note: 'linear' was declared here /kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq': /kisskb/src/drivers/tty/serial/8250/8250_core.c:246:2: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/tty/serial/8250/8250_core.c:231:19: note: 'i' was declared here INFO: Uncompressed kernel (size 0x40bfb0) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Completed OK # rm -rf /kisskb/build/powerpc-fixes_mvme5100_defconfig_powerpc # Build took: 0:00:19.508082