Huang Shijie 885d71e583 mtd: gpmi: fix the NULL pointer ... The imx23 board will check the fingerprint, so it will call the mx23_check_transcription_stamp. This function will use @chip->buffers->databuf as its buffer which is allocated in the nand_scan_tail(). Unfortunately, the mx23_check_transcription_stamp is called before the nand_scan_tail(). So we will meet a NULL pointer bug: -------------------------------------------------------------------- [ 1.150000] NAND device: Manufacturer ID: 0xec, Chip ID: 0xd7 (Samsung NAND 4GiB 3,3V 8-bit), 4096MiB, page size: 4096, OOB size: 8 [ 1.160000] Unable to handle kernel NULL pointer dereference at virtual address 000005d0 [ 1.170000] pgd = c0004000 [ 1.170000] [000005d0] *pgd=00000000 [ 1.180000] Internal error: Oops: 5 [#1] ARM [ 1.180000] Modules linked in: [ 1.180000] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.0 #89 [ 1.180000] task: c7440000 ti: c743a000 task.ti: c743a000 [ 1.180000] PC is at memcmp+0x10/0x54 [ 1.180000] LR is at gpmi_nand_probe+0x42c/0x894 [ 1.180000] pc : [<c025fcb0>] lr : [<c02f6a68>] psr: 20000053 [ 1.180000] sp : c743be2c ip : 600000d3 fp : ffffffff [ 1.180000] r10: 000005d0 r9 : c02f5f08 r8 : 00000000 [ 1.180000] r7 : c75858a8 r6 : c75858a8 r5 : c7585b18 r4 : c7585800 [ 1.180000] r3 : 000005d0 r2 : 00000004 r1 : c05c33e4 r0 : 000005d0 [ 1.180000] Flags: nzCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel [ 1.180000] Control: 0005317f Table: 40004000 DAC: 00000017 [ 1.180000] Process swapper (pid: 1, stack limit = 0xc743a1c0) -------------------------------------------------------------------- This patch rearrange the init procedure: Set the NAND_SKIP_BBTSCAN to skip the nand scan firstly, and after we set the proper settings, we will call the chip->scan_bbt() manually. Cc: stable@vger.kernel.org # 3.12 Signed-off-by: Huang Shijie <b32955@freescale.com> Reported-by: Fabio Estevam <festevam@gmail.com> Tested-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>		2013-11-12 10:17:57 -08:00
..
bch-regs.h	mtd: gpmi: set the Golois Field bit for mx6q's BCH	2013-02-04 10:27:59 +02:00
gpmi-lib.c	mtd: gpmi: imx6: fix the wrong method for checking ready/busy	2013-11-06 23:33:03 -08:00
gpmi-nand.c	mtd: gpmi: fix the NULL pointer	2013-11-12 10:17:57 -08:00
gpmi-nand.h	mtd: gpmi: move to use generic DMA helper	2013-04-04 21:22:45 +08:00
gpmi-regs.h	mtd: gpmi: decouple the chip select from the DMA channel	2013-11-06 23:33:01 -08:00
Makefile	mtd: add GPMI-NAND driver in the config and Makefile	2011-09-11 15:02:18 +03:00