diff mbox series

[1/3] ipmi:kcs_bmc: Add cleanup regmap(interrupt-regs) on a shutdown.

Message ID fb81dda34f9db0b9f743b247a2464576dcccd7c9.1661094034.git.i.kononenko@yadro.com
State New
Headers show
Series aspeed:lpc: Fix lpc-snoop probe exception | expand

Commit Message

i.kononenko Aug. 21, 2022, 3:54 p.m. UTC 
The bmc might be rebooted while the host is still reachable and the host
might send requests through configured lpc-kcs channels. That leads to
raise lpc-snoop interrupts that haven't adjusted IRQ handlers on next
early kernel boot, because on the aspeed-chip reboot it might keep
unclear registers on a state that is configured on the last boot.

The described case get a `nobody cared` warning about more than 100.000
requests when another one driver configures the same shared IRQ(e.g. 35)
and the interrupt will be passed through for lpc-kcs IRQ handler by
`IRQ_NONE` state flag.

The kernel output of described way is bellow:
```
[    1.360110] irq 35: nobody cared (try booting with the "irqpoll" option)
[    1.360145] CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.43-c109de3-24cc5b6 #1
[    1.360158] Hardware name: Generic DT based system
[    1.360168] Backtrace:
[    1.360228] [<80107f5c>] (dump_backtrace) from [<80108184>] (show_stack+0x20/0x24)
[    1.360250]  r7:00000023 r6:00000000 r5:00000000 r4:9d12d560
[    1.360283] [<80108164>] (show_stack) from [<8084ae54>] (dump_stack+0x20/0x28)
[    1.360316] [<8084ae34>] (dump_stack) from [<80156790>] (__report_bad_irq+0x40/0xc0)
[    1.360344] [<80156750>] (__report_bad_irq) from [<801566c0>] (note_interrupt+0x238/0x290)
[    1.360366]  r9:9d0ae000 r8:9d00c600 r7:00000023 r6:00000000 r5:00000000 r4:9d12d560
[    1.360408] [<80156488>] (note_interrupt) from [<80153594>] (handle_irq_event+0xb4/0xc4)
[    1.360429]  r10:00000000 r9:9d0ae000 r8:9d00c600 r7:00000001 r6:00000000 r5:00000000
[    1.360440]  r4:9d12d560 r3:00000000
[    1.360466] [<801534e0>] (handle_irq_event) from [<8015788c>] (handle_level_irq+0xac/0x180)
[    1.360480]  r5:80c7d35c r4:9d12d560
[    1.360503] [<801577e0>] (handle_level_irq) from [<80152a5c>] (__handle_domain_irq+0x6c/0xc8)
[    1.360519]  r5:80c7d35c r4:9d12d560
[    1.360545] [<801529f0>] (__handle_domain_irq) from [<801021cc>] (avic_handle_irq+0x68/0x70)
[    1.360568]  r9:9d0ae000 r8:9d12d608 r7:9d0afc84 r6:ffffffff r5:9d0afc50 r4:9d002380
[    1.360587] [<80102164>] (avic_handle_irq) from [<80101a6c>] (__irq_svc+0x6c/0x90)
[    1.360603] Exception stack(0x9d0afc50 to 0x9d0afc98)
[    1.360620] fc40:                                     00000000 00000100 00000000 00000000
[    1.360640] fc60: 9d12d560 98bbd0c0 00000000 00000023 9d12d608 60000053 00000000 9d0afcd4
[    1.360657] fc80: 9d0afc80 9d0afca0 801570ec 80154cdc 40000053 ffffffff
[    1.360670]  r5:40000053 r4:80154cdc
[    1.360693] [<801549e0>] (__setup_irq) from [<801555e4>] (request_threaded_irq+0xdc/0x15c)
[    1.360715]  r9:98bbb340 r8:00000023 r7:9d12d570 r6:9d12d560 r5:00000000 r4:98bbd0c0
[    1.360741] [<80155508>] (request_threaded_irq) from [<801589d8>] (devm_request_threaded_irq+0x70/0xc4)
[    1.360762]  r10:80a7353c r9:00000000 r8:98bbb340 r7:9d130e10 r6:00000023 r5:804f4a70
[    1.360774]  r4:98bbd020 r3:00000080
[    1.360800] [<80158968>] (devm_request_threaded_irq) from [<804f4ebc>] (aspeed_lpc_snoop_probe+0x100/0x2ac)
[    1.360821]  r10:00000000 r9:9d130e10 r8:98bbd040 r7:00000000 r6:9d130e00 r5:98bbb340
[    1.360830]  r4:00000000
[    1.360851] [<804f4dbc>] (aspeed_lpc_snoop_probe) from [<8056a5c4>] (platform_drv_probe+0x44/0x80)
[    1.360873]  r9:80c5ef90 r8:00000000 r7:80cc2938 r6:00000000 r5:80c5ef90 r4:9d130e10
[    1.360910] [<8056a580>] (platform_drv_probe) from [<80568420>] (really_probe+0x26c/0x498)
[    1.360924]  r5:80cc282c r4:9d130e10
[    1.360949] [<805681b4>] (really_probe) from [<80568c28>] (driver_probe_device+0x138/0x184)
[    1.360970]  r10:80b0050c r9:80adadb0 r8:00000007 r7:80c5ef90 r6:9d130e10 r5:00000000
[    1.360981]  r4:80c5ef90
[    1.361004] [<80568af0>] (driver_probe_device) from [<80568fe4>] (device_driver_attach+0xb8/0xc0)
[    1.361020]  r7:80c5ef90 r6:9d130e54 r5:00000000 r4:9d130e10
[    1.361046] [<80568f2c>] (device_driver_attach) from [<80569070>] (__driver_attach+0x84/0x16c)
[    1.361063]  r7:80c61128 r6:9d130e10 r5:00000001 r4:80c5ef90
[    1.361088] [<80568fec>] (__driver_attach) from [<80566068>] (bus_for_each_dev+0x84/0xcc)
[    1.361106]  r7:80c61128 r6:80568fec r5:80c5ef90 r4:00000000
[    1.361130] [<80565fe4>] (bus_for_each_dev) from [<80569180>] (driver_attach+0x28/0x30)
[    1.361147]  r6:00000000 r5:9d1a3d40 r4:80c5ef90
[    1.361169] [<80569158>] (driver_attach) from [<80566a08>] (bus_add_driver+0x114/0x200)
[    1.361195] [<805668f4>] (bus_add_driver) from [<80569814>] (driver_register+0x98/0x128)
[    1.361214]  r7:00000000 r6:80ca0ca0 r5:00000000 r4:80c5ef90
[    1.361241] [<8056977c>] (driver_register) from [<8056b528>] (__platform_driver_register+0x40/0x54)
[    1.361256]  r5:000000b8 r4:80b2575c
[    1.361294] [<8056b4e8>] (__platform_driver_register) from [<80b2577c>] (aspeed_lpc_snoop_driver_init+0x20/0x28)
[    1.361331] [<80b2575c>] (aspeed_lpc_snoop_driver_init) from [<80b01318>] (do_one_initcall+0x84/0x184)
[    1.361356] [<80b01294>] (do_one_initcall) from [<80b01540>] (kernel_init_freeable+0x128/0x1ec)
[    1.361375]  r7:80b3f858 r6:80ca0ca0 r5:000000b8 r4:80b61914
[    1.361412] [<80b01418>] (kernel_init_freeable) from [<80864060>] (kernel_init+0x18/0x11c)
[    1.361435]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80864048
[    1.361444]  r4:00000000
[    1.361470] [<80864048>] (kernel_init) from [<801010e8>] (ret_from_fork+0x14/0x2c)
[    1.361483] Exception stack(0x9d0affb0 to 0x9d0afff8)
[    1.361500] ffa0:                                     00000000 00000000 00000000 00000000
[    1.361518] ffc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    1.361535] ffe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    1.361547]  r5:80864048 r4:00000000
[    1.361555] handlers:
[    1.361592] [<(ptrval)>] aspeed_lpc_snoop_irq
[    1.361609] Disabling IRQ #35

```

Note:
 * The lpc-snoop driver found on the same 1e789080 address and have
same IRQ#35 as for lpc-kcs
 * The lpc-snoop initizalied earlier than lpc-kcs.

The patch brings a way to masking lpc-kcs interrupt all through
a bmc-rebooting time.

Tested on the YADRO VEGMAN N110 stand.

Signed-off-by: Igor Kononenko <i.kononenko@yadro.com>
---
 drivers/char/ipmi/kcs_bmc_aspeed.c | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

kernel test robot Aug. 21, 2022, 7:46 p.m. UTC | #1 
Hi Igor,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on cminyard-ipmi/for-next]
[also build test ERROR on soc/for-next linus/master v6.0-rc1 next-20220819]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Igor-Kononenko/aspeed-lpc-Fix-lpc-snoop-probe-exception/20220822-000836
base:   https://github.com/cminyard/linux-ipmi for-next
config: riscv-randconfig-r042-20220821 (https://download.01.org/0day-ci/archive/20220822/202208220317.cROZCTcB-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 01ffe31cbb54bfd8e38e71b3cf804a1d67ebf9c1)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/9c523bc00c11d0e9499bf6e3d3c5cc2fcf3fff8f
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Igor-Kononenko/aspeed-lpc-Fix-lpc-snoop-probe-exception/20220822-000836
        git checkout 9c523bc00c11d0e9499bf6e3d3c5cc2fcf3fff8f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   In file included from drivers/char/ipmi/kcs_bmc_aspeed.c:10:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __raw_readb(PCI_IOBASE + addr);
                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/char/ipmi/kcs_bmc_aspeed.c:10:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
                                                           ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/char/ipmi/kcs_bmc_aspeed.c:10:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/riscv/include/asm/io.h:136:
   include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writeb(value, PCI_IOBASE + addr);
                               ~~~~~~~~~~ ^
   include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
                                                         ~~~~~~~~~~ ^
   include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                     ~~~~~~~~~~ ^
>> drivers/char/ipmi/kcs_bmc_aspeed.c:643:29: error: incompatible pointer types passing 'struct kcs_bmc *' to parameter of type 'struct kcs_bmc_device *' [-Werror,-Wincompatible-pointer-types]
           aspeed_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF), 0);
                                      ^~~~~~~
   drivers/char/ipmi/kcs_bmc_aspeed.c:399:63: note: passing argument to parameter 'kcs_bmc' here
   static void aspeed_kcs_irq_mask_update(struct kcs_bmc_device *kcs_bmc, u8 mask, u8 state)
                                                                 ^
   7 warnings and 1 error generated.


vim +643 drivers/char/ipmi/kcs_bmc_aspeed.c

   638	
   639	static void aspeed_kcs_shutdown(struct platform_device *pdev)
   640	{
   641		struct kcs_bmc *kcs_bmc = dev_get_drvdata(&pdev->dev);
   642	
 > 643		aspeed_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF), 0);
   644	}
   645
diff mbox series

Patch

diff --git a/drivers/char/ipmi/kcs_bmc_aspeed.c b/drivers/char/ipmi/kcs_bmc_aspeed.c
index cdc88cde1e9a..440f31d96bd3 100644
--- a/drivers/char/ipmi/kcs_bmc_aspeed.c
+++ b/drivers/char/ipmi/kcs_bmc_aspeed.c
@@ -636,6 +636,13 @@  static int aspeed_kcs_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void aspeed_kcs_shutdown(struct platform_device *pdev)
+{
+	struct kcs_bmc *kcs_bmc = dev_get_drvdata(&pdev->dev);
+
+	aspeed_kcs_irq_mask_update(kcs_bmc, (KCS_BMC_EVENT_TYPE_IBF), 0);
+}
+
 static const struct of_device_id ast_kcs_bmc_match[] = {
 	{ .compatible = "aspeed,ast2400-kcs-bmc-v2" },
 	{ .compatible = "aspeed,ast2500-kcs-bmc-v2" },
@@ -651,6 +658,7 @@  static struct platform_driver ast_kcs_bmc_driver = {
 	},
 	.probe  = aspeed_kcs_probe,
 	.remove = aspeed_kcs_remove,
+	.shutdown = aspeed_kcs_shutdown,
 };
 module_platform_driver(ast_kcs_bmc_driver);