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On AM3517, tx and rx interrupt are detected together with the disconnect event. This generates a kernel panic in musb_interrupt, because rx / tx are handled after disconnect. This issue was seen on a Technexion's TAM3517 SOM. Unplugging a device, tx / rx interrupts together with disconnect are detected. This brings to kernel panic like this: [ 68.526153] Unable to handle kernel NULL pointer dereference at virtual address 00000011 [ 68.534698] pgd = c0004000 [ 68.537536] [00000011] *pgd=00000000 [ 68.541351] Internal error: Oops: 17 [#1] ARM [ 68.545928] Modules linked in: [ 68.549163] CPU: 0 Not tainted (3.6.0-rc5-00020-g9e05905 #178) [ 68.555694] PC is at rxstate+0x8/0xdc [ 68.559539] LR is at musb_interrupt+0x98/0x858 [ 68.564239] pc : [<c035cd88>] lr : [<c035af1c>] psr: 40000193 [ 68.564239] sp : ce83fb40 ip : d0906410 fp : 00000000 [ 68.576293] r10: 00000000 r9 : cf3b0e40 r8 : 00000002 [ 68.581817] r7 : 00000019 r6 : 00000001 r5 : 00000001 r4 : 000000d4 [ 68.588684] r3 : 00000000 r2 : 00000000 r1 : ffffffcc r0 : cf23c108 [ 68.595550] Flags: nZcv IRQs off FIQs on Mode SVC_32 ISA ARM Segment ke Note: this behavior is not seen with a USB hub, while it is easy to reproduce connecting a USB-pen directly to the USB-A of the board. Drop tx / rx interrupts if disconnect is detected. Signed-off-by: Stefano Babic <sbabic@denx.de> CC: Felipe Balbi <balbi@ti.com> Cc: stable@vger.kernel.org # 3.5 3.6 Tested-by: Dmitry Lifshitz <lifshitz@compulab.co.il> Tested-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Felipe Balbi <balbi@ti.com> |
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| .. | ||
| am35x.c | ||
| blackfin.c | ||
| blackfin.h | ||
| cppi_dma.c | ||
| cppi_dma.h | ||
| da8xx.c | ||
| davinci.c | ||
| davinci.h | ||
| Kconfig | ||
| Makefile | ||
| musb_core.c | ||
| musb_core.h | ||
| musb_debug.h | ||
| musb_debugfs.c | ||
| musb_dma.h | ||
| musb_dsps.c | ||
| musb_gadget_ep0.c | ||
| musb_gadget.c | ||
| musb_gadget.h | ||
| musb_host.c | ||
| musb_host.h | ||
| musb_io.h | ||
| musb_regs.h | ||
| musb_virthub.c | ||
| musbhsdma.c | ||
| musbhsdma.h | ||
| omap2430.c | ||
| omap2430.h | ||
| tusb6010_omap.c | ||
| tusb6010.c | ||
| tusb6010.h | ||
| ux500_dma.c | ||
| ux500.c | ||