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331d880b35
In hibmc_drm_fb_create(), when the call to hibmc_framebuffer_init() fails
with error, do not store the error code in the HiBMC device frame-buffer
pointer, as this will be later checked for non-zero value in
hibmc_fbdev_destroy() when our intention is to check for a valid function
pointer.
This fixes the following crash:
[ 9.699791] Unable to handle kernel NULL pointer dereference at virtual address 000000000000001a
[ 9.708672] Mem abort info:
[ 9.711489] ESR = 0x96000004
[ 9.714570] Exception class = DABT (current EL), IL = 32 bits
[ 9.720551] SET = 0, FnV = 0
[ 9.723631] EA = 0, S1PTW = 0
[ 9.726799] Data abort info:
[ 9.729702] ISV = 0, ISS = 0x00000004
[ 9.733573] CM = 0, WnR = 0
[ 9.736566] [000000000000001a] user address but active_mm is swapper
[ 9.742987] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[ 9.748614] Modules linked in:
[ 9.751694] CPU: 16 PID: 293 Comm: kworker/16:1 Tainted: G W 4.19.0-rc4-next-20180920-00001-g9b0012c #322
[ 9.762681] Hardware name: Huawei Taishan 2280 /D05, BIOS Hisilicon D05 IT21 Nemo 2.0 RC0 04/18/2018
[ 9.771915] Workqueue: events work_for_cpu_fn
[ 9.776312] pstate: 60000005 (nZCv daif -PAN -UAO)
[ 9.781150] pc : drm_mode_object_put+0x0/0x20
[ 9.785547] lr : hibmc_fbdev_fini+0x40/0x58
[ 9.789767] sp : ffff00000af1bcf0
[ 9.793108] x29: ffff00000af1bcf0 x28: 0000000000000000
[ 9.798473] x27: 0000000000000000 x26: ffff000008f66630
[ 9.803838] x25: 0000000000000000 x24: ffff0000095abb98
[ 9.809203] x23: ffff8017db92fe00 x22: ffff8017d2b13000
[ 9.814568] x21: ffffffffffffffea x20: ffff8017d2f80018
[ 9.819933] x19: ffff8017d28a0018 x18: ffffffffffffffff
[ 9.825297] x17: 0000000000000000 x16: 0000000000000000
[ 9.830662] x15: ffff0000092296c8 x14: ffff00008939970f
[ 9.836026] x13: ffff00000939971d x12: ffff000009229940
[ 9.841391] x11: ffff0000085f8fc0 x10: ffff00000af1b9a0
[ 9.846756] x9 : 000000000000000d x8 : 6620657a696c6169
[ 9.852121] x7 : ffff8017d3340580 x6 : ffff8017d4168000
[ 9.857486] x5 : 0000000000000000 x4 : ffff8017db92fb20
[ 9.862850] x3 : 0000000000002690 x2 : ffff8017d3340480
[ 9.868214] x1 : 0000000000000028 x0 : 0000000000000002
[ 9.873580] Process kworker/16:1 (pid: 293, stack limit = 0x(____ptrval____))
[ 9.880788] Call trace:
[ 9.883252] drm_mode_object_put+0x0/0x20
[ 9.887297] hibmc_unload+0x1c/0x80
[ 9.890815] hibmc_pci_probe+0x170/0x3c8
[ 9.894773] local_pci_probe+0x3c/0xb0
[ 9.898555] work_for_cpu_fn+0x18/0x28
[ 9.902337] process_one_work+0x1e0/0x318
[ 9.906382] worker_thread+0x228/0x450
[ 9.910164] kthread+0x128/0x130
[ 9.913418] ret_from_fork+0x10/0x18
[ 9.917024] Code: a94153f3 a8c27bfd d65f03c0 d503201f (f9400c01)
[ 9.923180] ---[ end trace 2695ffa0af5be375 ]---
Fixes:
|
||
|---|---|---|
| .. | ||
| accessibility | ||
| acpi | ||
| amba | ||
| android | ||
| ata | ||
| atm | ||
| auxdisplay | ||
| base | ||
| bcma | ||
| block | ||
| bluetooth | ||
| bus | ||
| cdrom | ||
| char | ||
| clk | ||
| clocksource | ||
| connector | ||
| cpufreq | ||
| cpuidle | ||
| crypto | ||
| dax | ||
| dca | ||
| devfreq | ||
| dio | ||
| dma | ||
| dma-buf | ||
| edac | ||
| eisa | ||
| extcon | ||
| firewire | ||
| firmware | ||
| fmc | ||
| fpga | ||
| fsi | ||
| gnss | ||
| gpio | ||
| gpu | ||
| hid | ||
| hsi | ||
| hv | ||
| hwmon | ||
| hwspinlock | ||
| hwtracing | ||
| i2c | ||
| ide | ||
| idle | ||
| iio | ||
| infiniband | ||
| input | ||
| iommu | ||
| ipack | ||
| irqchip | ||
| isdn | ||
| leds | ||
| lightnvm | ||
| macintosh | ||
| mailbox | ||
| mcb | ||
| md | ||
| media | ||
| memory | ||
| memstick | ||
| message | ||
| mfd | ||
| misc | ||
| mmc | ||
| mtd | ||
| mux | ||
| net | ||
| nfc | ||
| ntb | ||
| nubus | ||
| nvdimm | ||
| nvme | ||
| nvmem | ||
| of | ||
| opp | ||
| oprofile | ||
| parisc | ||
| parport | ||
| pci | ||
| pcmcia | ||
| perf | ||
| phy | ||
| pinctrl | ||
| platform | ||
| pnp | ||
| power | ||
| powercap | ||
| pps | ||
| ps3 | ||
| ptp | ||
| pwm | ||
| rapidio | ||
| ras | ||
| regulator | ||
| remoteproc | ||
| reset | ||
| rpmsg | ||
| rtc | ||
| s390 | ||
| sbus | ||
| scsi | ||
| sfi | ||
| sh | ||
| siox | ||
| slimbus | ||
| sn | ||
| soc | ||
| soundwire | ||
| spi | ||
| spmi | ||
| ssb | ||
| staging | ||
| target | ||
| tc | ||
| tee | ||
| thermal | ||
| thunderbolt | ||
| tty | ||
| uio | ||
| usb | ||
| uwb | ||
| vfio | ||
| vhost | ||
| video | ||
| virt | ||
| virtio | ||
| visorbus | ||
| vlynq | ||
| vme | ||
| w1 | ||
| watchdog | ||
| xen | ||
| zorro | ||
| Kconfig | ||
| Makefile | ||