Hi, I am getting below kernel panic (A) while running USBTEST t-5 on OMAP3EVM. I found below two recent patches on usb sg list. 1. USB: Change the scatterlist type in struct urb [910f8d0] 2. USB: simplify usb_sg_init() [0ba169a] If I revert the patch -1 alone then I get another kernel panic-B Reverting both the above patches doesn't cause any panic. -Ajay ---------------------------------- Kernel-Panic-A ---------------- proc/bus/usb/001/002 test 3, 0.251770 secs unknown speedusbtest 1-2:3.0: TEST 5: write 1000 sglists 32 entries of 512 bytes /proc/bus/usb/001/002 Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = cfee4000 [00000000] *pgd=8ffd8031, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] last sysfs file: /sys/kernel/uevent_seqnum Modules linked in: CPU: 0 Not tainted (2.6.35-rc3-00010-g8f4ed29-dirty #23) PC is at sg_next+0x0/0x24 LR is at usb_sg_init+0x198/0x218 --- -- [<c01829b8>] (sg_next+0x0/0x24) from [<c0200a80>] (usb_sg_init+0x198/0x218) [<c0200a80>] (usb_sg_init+0x198/0x218) from [<c0217ba8>] (perform_sglist+0x58/0xd0) [<c0217ba8>] (perform_sglist+0x58/0xd0) from [<c02189ac>] (usbtest_ioctl+0x42c/0x1620) [<c02189ac>] (usbtest_ioctl+0x42c/0x1620) from [<c0208d80>] (usbdev_ioctl+0x1300/0x14f8) [<c0208d80>] (usbdev_ioctl+0x1300/0x14f8) from [<c00aec24>] (vfs_ioctl+0x2c/0x70) [<c00aec24>] (vfs_ioctl+0x2c/0x70) from [<c00af338>] (do_vfs_ioctl+0x4f8/0x538) [<c00af338>] (do_vfs_ioctl+0x4f8/0x538) from [<c00af3ac>] (sys_ioctl+0x34/0x54) [<c00af3ac>] (sys_ioctl+0x34/0x54) from [<c002ce80>] (ret_fast_syscall+0x0/0x30) ------------------------------------------------------------------ ---------------------------------- Kernel-Panic-B ------------ usbtest 1-2:3.0: TEST 5: write 1000 sglists 32 entries of 512 bytes Unable to handle kernel NULL pointer dereference at virtual address 00000000 pgd = cfd3c000 [00000000] *pgd=8fde1031, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] last sysfs file: /sys/kernel/uevent_seqnum Modules linked in: CPU: 0 Not tainted (2.6.35-rc3-00004-g050dd15 #26) PC is at dma_map_sg+0x20/0xe8 LR is at usb_hcd_submit_urb+0x6c0/0x924 ---- [<c00329e0>] (dma_map_sg+0x20/0xe8) from [<c01ff478>] (usb_hcd_submit_urb+0x6c0/0x924) [<c01ff478>] (usb_hcd_submit_urb+0x6c0/0x924) from [<c02007e8>] (usb_sg_wait+0x34/0x134) [<c02007e8>] (usb_sg_wait+0x34/0x134) from [<c0217ca8>] (perform_sglist+0x68/0xd0) [<c0217ca8>] (perform_sglist+0x68/0xd0) from [<c0218a9c>] (usbtest_ioctl+0x42c/0x1620) [<c0218a9c>] (usbtest_ioctl+0x42c/0x1620) from [<c0208e70>] (usbdev_ioctl+0x1300/0x14f8) [<c0208e70>] (usbdev_ioctl+0x1300/0x14f8) from [<c00aec24>] (vfs_ioctl+0x2c/0x70) [<c00aec24>] (vfs_ioctl+0x2c/0x70) from [<c00af338>] (do_vfs_ioctl+0x4f8/0x538) [<c00af338>] (do_vfs_ioctl+0x4f8/0x538) from [<c00af3ac>] (sys_ioctl+0x34/0x54) [<c00af3ac>] (sys_ioctl+0x34/0x54) from [<c002ce80>] (ret_fast_syscall+0x0/0x30) ------------------------------------------------------------- -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
