From 0874f8ec9b0a462cc8787b7bb4b7824a1690da10 Mon Sep 17 00:00:00 2001 From: Bart Van Assche Date: Mon, 16 Nov 2015 15:26:51 -0800 Subject: [PATCH] qla2xxx: Fix rwlock recursion This patch fixes the following kernel bug: kernel:BUG: rwlock recursion on CPU#2, insmod/39333, ffff8803e998cb28 kernel: Call Trace: kernel: [] dump_stack+0x48/0x64 kernel: [] rwlock_bug+0x67/0x70 kernel: [] do_raw_write_lock+0x8a/0xa0 kernel: [] _raw_write_lock_irqsave+0x63/0x80 kernel: [] qla82xx_rd_32+0xe8/0x140 [qla2xxx] kernel: [] qla82xx_crb_win_lock+0x25/0x60 [qla2xxx] kernel: [] qla82xx_wr_32+0xf6/0x150 [qla2xxx] kernel: [] qla82xx_disable_intrs+0x50/0x80 [qla2xxx] kernel: [] qla82xx_reset_chip+0x1a/0x20 [qla2xxx] kernel: [] qla2x00_initialize_adapter+0x132/0x420 [qla2xxx] kernel: [] qla82xx_rd_32+0xe8/0x140 [qla2xxx] kernel: [] qla82xx_crb_win_lock+0x25/0x60 [qla2xxx] kernel: [] qla82xx_wr_32+0xf6/0x150 [qla2xxx] kernel: [] qla82xx_disable_intrs+0x50/0x80 [qla2xxx] kernel: [] qla82xx_reset_chip+0x1a/0x20 [qla2xxx] kernel: [] qla2x00_initialize_adapter+0x132/0x420 [qla2xxx] kernel: [] qla2x00_probe_one+0xefe/0x2130 [qla2xxx] kernel: [] local_pci_probe+0x4c/0xa0 kernel: [] pci_call_probe+0x83/0xa0 kernel: [] pci_device_probe+0x7f/0xb0 kernel: [] really_probe+0x133/0x390 kernel: [] driver_probe_device+0x59/0xd0 kernel: [] __driver_attach+0xa1/0xb0 kernel: [] bus_for_each_dev+0x8d/0xb0 kernel: [] driver_attach+0x1e/0x20 kernel: [] bus_add_driver+0x1d2/0x290 kernel: [] driver_register+0x60/0xe0 kernel: [] __pci_register_driver+0x64/0x70 kernel: [] qla2x00_module_init+0x1cb/0x21b [qla2xxx] kernel: [] do_one_initcall+0xad/0x1c0 kernel: [] do_init_module+0x69/0x210 kernel: [] load_module+0x5cc/0x750 kernel: [] SyS_init_module+0x92/0xc0 kernel: [] entry_SYSCALL_64_fastpath+0x12/0x6f Fixes: 8dfa4b5a9b44 ("qla2xxx: Fix sparse annotation") Signed-off-by: Bart Van Assche Reported-by: Himanshu Madhani Tested-by: Himanshu Madhani Reviewed-by: Himanshu Madhani Reviewed-by: Chad Dupuis Cc: Giridhar Malavali Cc: Xose Vazquez Perez Cc: stable # v4.3+ Signed-off-by: Martin K. Petersen --- drivers/scsi/qla2xxx/qla_nx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/qla2xxx/qla_nx.c b/drivers/scsi/qla2xxx/qla_nx.c index eb0cc5475c45..b6b4cfdd7620 100644 --- a/drivers/scsi/qla2xxx/qla_nx.c +++ b/drivers/scsi/qla2xxx/qla_nx.c @@ -433,7 +433,7 @@ qla82xx_pci_get_crb_addr_2M(struct qla_hw_data *ha, ulong off_in, if (off_in < QLA82XX_PCI_CRBSPACE) return -1; - *off_out = (void __iomem *)(off_in - QLA82XX_PCI_CRBSPACE); + off_in -= QLA82XX_PCI_CRBSPACE; /* Try direct map */ m = &crb_128M_2M_map[CRB_BLK(off_in)].sub_block[CRB_SUBBLK(off_in)]; @@ -443,6 +443,7 @@ qla82xx_pci_get_crb_addr_2M(struct qla_hw_data *ha, ulong off_in, return 0; } /* Not in direct map, use crb window */ + *off_out = (void __iomem *)off_in; return 1; } -- 2.20.1