After compiling the shared transport driver as a module, it works just fine as-is in the 4.2.x kernels when enabled with modprobe. However when compiled as module and enabled with modprobe with the 4.3-rc7, it generates a segmentation fault and the dependent drivers (like BTWILINK) don't function. This was done an Logic PD Torpedo Torpedo + Wireless which utilizes a DM3730 processor. # modprobe st_drv \[ 16.543182] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 16.551757] pgd = cb0a8000 [ 16.554718] [00000000] *pgd=8f70e831, *pte=00000000, *ppte=00000000 [ 16.561370] Internal error: Oops: 17 [#1] SMP ARM [ 16.566345] Modules linked in: st_drv(+) arc4 wl12xx wlcore mac80211 cfg80211 wlcore_sdio [ 16.575073] CPU: 0 PID: 137 Comm: modprobe Not tainted 4.3.0-rc7-dirty #2 [ 16.582214] Hardware name: Generic OMAP36xx (Flattened Device Tree) [ 16.588836] task: cb06b180 ti: cb0a6000 task.ti: cb0a6000 [ 16.594543] PC is at kim_probe+0x78/0x220 [st_drv] [ 16.599609] LR is at st_core_init+0x90/0x154 [st_drv] [ 16.604949] pc : [<bf1bd2b0>] lr : [<bf1bceac>] psr: 600d0013 [ 16.604949] sp : cb0a7d68 ip : 00000001 fp : bf1bf008 [ 16.617065] r10: 308b3ea8 r9 : 00000001 r8 : 00000000 [ 16.622558] r7 : fffffdfb r6 : bf1beef0 r5 : cf1ea000 r4 : cb2b7f00 [ 16.629455] r3 : cb2b7e00 r2 : dead4ead r1 : bf1be65c r0 : 00000000 [ 16.636322] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 16.643859] Control: 10c5387d Table: 8b0a8019 DAC: 00000051 [ 16.649902] Process modprobe (pid: 137, stack limit = 0xcb0a6218) [ 16.656341] Stack: (0xcb0a7d68 to 0xcb0a8000) [ 16.660949] 7d60: cf1ea010 bf1beef0 cf1ea010 cf1ea010 bf1beef0 fffffdfb [ 16.669586] 7d80: 00000005 c03dd7ec c03dd7a8 cf1ea010 c11c2058 bf1beef0 00000000 c03dbdac [ 16.678222] 7da0: cf1ea010 bf1beef0 cf1ea044 c0991f60 00000000 c03dbf3c 00000000 bf1beef0 [ 16.686828] 7dc0: c03dbea8 c03da224 cf0caaa4 cf1ece10 bf1beef0 cb2aeec0 00000000 c03db4d8 [ 16.695465] 7de0: bf1be65c bf1beef0 c09163a0 bf1beef0 c09163a0 cf74c040 bf1c2000 c03dc890 [ 16.704101] 7e00: 00000000 c09163a0 c09163a0 c0009804 cfd42ea4 c011fb68 cb0a6000 c09c3cb4 [ 16.712738] 7e20: 0000000f cfbb1000 cfd42ea4 00000000 0000005b c0091058 cccee540 000000d0 [ 16.721374] 7e40: 000000d0 c01607a0 cb0a7f40 c0091058 c0911f9c 600d0013 a00d0013 bf1befc0 [ 16.730010] 7e60: bf1befc0 c09c74e8 cccee540 00000001 cf74c180 308b3ea8 bf1bf008 c0119304 [ 16.738616] 7e80: c09c74e8 bf1befc0 cb0a7f40 c09c74e8 bf1befc0 c00cb1e0 bf1befcc 00007fff [ 16.747253] 7ea0: 00000000 c00c8c08 cccee540 c119ffe4 c00c8428 bf1befcc bf1bf1dc d1ddd718 [ 16.755889] 7ec0: bf1befcc 00000000 00000010 cf6c6000 00000000 c01560b0 ff000000 00000000 [ 16.764526] 7ee0: 00000000 bf1bde78 00000002 00000000 00000000 00000000 00000000 00000000 [ 16.773162] 7f00: 00000000 00000000 00000000 00000000 00000000 00000000 c00cb9ac 00000000 [ 16.781799] 7f20: 0000a41b b6e06423 00000000 000b1750 d1df341b cb0a6000 00000051 c00cba1c [ 16.790435] 7f40: d1d99000 0005a41b d1ddcf48 d1ddcd41 d1df2b48 0000322c 00003c7c 00000000 [ 16.799041] 7f60: 00000000 00000000 00000032 00000033 0000001a 0000001e 00000016 00000000 [ 16.807678] 7f80: 00000000 0005a41b 000b1750 000b1710 00000080 c000f8c4 cb0a6000 00000000 [ 16.816314] 7fa0: 00000000 c000f720 0005a41b 000b1750 b6dac008 0005a41b 000b1750 000b1a28 [ 16.824951] 7fc0: 0005a41b 000b1750 000b1710 00000080 000b1a28 00000000 000b1710 00000000 [ 16.833587] 7fe0: bea7db38 bea7db28 0001be18 b6ed22d0 600d0010 b6dac008 8fdf6861 8fdf6c61 [ 16.842254] [<bf1bd2b0>] (kim_probe [st_drv]) from [<c03dd7ec>] (platform_drv_probe+0x44/0xa4) [ 16.851348] [<c03dd7ec>] (platform_drv_probe) from [<c03dbdac>] (driver_probe_device+0x1f4/0x2f0) [ 16.860717] [<c03dbdac>] (driver_probe_device) from [<c03dbf3c>] (__driver_attach+0x94/0x98) [ 16.869628] [<c03dbf3c>] (__driver_attach) from [<c03da224>] (bus_for_each_dev+0x6c/0xa0) [ 16.878265] [<c03da224>] (bus_for_each_dev) from [<c03db4d8>] (bus_add_driver+0x18c/0x214) [ 16.886993] [<c03db4d8>] (bus_add_driver) from [<c03dc890>] (driver_register+0x78/0xf8) [ 16.895446] [<c03dc890>] (driver_register) from [<c0009804>] (do_one_initcall+0x80/0x1dc) [ 16.904083] [<c0009804>] (do_one_initcall) from [<c0119304>] (do_init_module+0x5c/0x1d0) [ 16.912628] [<c0119304>] (do_init_module) from [<c00cb1e0>] (load_module+0x1880/0x1fe0) [ 16.921081] [<c00cb1e0>] (load_module) from [<c00cba1c>] (SyS_init_module+0xdc/0x14c) [ 16.929351] [<c00cba1c>] (SyS_init_module) from [<c000f720>] (ret_fast_syscall+0x0/0x1c) [ 16.937896] Code: 1a000050 e5943094 e59f1170 e58340ec (e5980000) [ 16.944458] ---[ end trace dda7ebdfcb435ea8 ]--- Segmentation fault # -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
