Re: [PATCH] spi: s3c64xx: Don't free controller_data on non-dt platforms
On Thu, Sep 13, 2012 at 04:31:30PM +0200, Sylwester Nawrocki wrote: > When s3c64xx-spi is instantiated from device tree an instance of > struct s3c64xx_spi_csinfo is dynamically allocated in the driver. Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
RE: [PATCH] spi: s3c64xx: Don't free controller_data on non-dt platforms
Sylwester Nawrocki wrote: > > When s3c64xx-spi is instantiated from device tree an instance of > struct s3c64xx_spi_csinfo is dynamically allocated in the driver. > For non-dt platform it is passed from board code through > spi_register_board_info(). On error path in s3c64xx_spi_setup() > function there is an attempt to free this data struct > s3c64xx_spi_csinfo object as it would have been allocated in the > driver for both, dt and non-dt based platforms. This leads to > following bug when gpio request fails: > > spi spi1.0: Failed to get /CS gpio [21]: -16 > kernel BUG at mm/slub.c:3478! > Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM > Modules linked in: > CPU: 0Not tainted (3.6.0-rc5-00092-g9b0b493-dirty #6111) > PC is at kfree+0x148/0x158 > LR is at s3c64xx_spi_setup+0xac/0x290 > pc : []lr : []psr: 4013 > sp : ee043e10 ip : c032883c fp : c0481f7c > r10: ee0abd80 r9 : 0063 r8 : > r7 : ee129e78 r6 : ee104a00 r5 : fff0 r4 : c047bc64 > r3 : 4400 r2 : c047bc64 r1 : c04def60 r0 : 0004047b > Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel > Control: 10c5387d Table: 4000404a DAC: 0015 > Process swapper/0 (pid: 1, stack limit = 0xee0422f0) > Stack: (0xee043e10 to 0xee044000) > ... > [] (kfree+0x148/0x158) from [] > (s3c64xx_spi_setup+0xac/0x290) > [] (s3c64xx_spi_setup+0xac/0x290) from [] > (spi_setup+0x34/0x4c) > [] (spi_setup+0x34/0x4c) from [] > (spi_add_device+0x98/0x128) > [] (spi_add_device+0x98/0x128) from [] > (spi_new_device+0x74/0xa8) > [] (spi_new_device+0x74/0xa8) from [] > (spi_match_master_to_boardinfo+0x24/0x44) > [] (spi_match_master_to_boardinfo+0x24/0x44) from [] > (spi_register_master+0xf4/0x2a8) > [] (spi_register_master+0xf4/0x2a8) from [] > (s3c64xx_spi_probe+0x34c/0x42c) > [] (s3c64xx_spi_probe+0x34c/0x42c) from [] > (platform_drv_probe+0x18/0x1c) > > There should be no attempt to kfree controller_data when it was > externally provided through the board code. Fix this by freeing > controller_data only when dev->of_node is not null. > > Signed-off-by: Sylwester Nawrocki > Signed-off-by: Kyungmin Park Yes, correct. Need to check it. Acked-by: Kukjin Kim Thanks. Best regards, Kgene. -- Kukjin Kim , Senior Engineer, SW Solution Development Team, Samsung Electronics Co., Ltd. -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] spi: s3c64xx: Don't free controller_data on non-dt platforms
When s3c64xx-spi is instantiated from device tree an instance of struct s3c64xx_spi_csinfo is dynamically allocated in the driver. For non-dt platform it is passed from board code through spi_register_board_info(). On error path in s3c64xx_spi_setup() function there is an attempt to free this data struct s3c64xx_spi_csinfo object as it would have been allocated in the driver for both, dt and non-dt based platforms. This leads to following bug when gpio request fails: spi spi1.0: Failed to get /CS gpio [21]: -16 kernel BUG at mm/slub.c:3478! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0Not tainted (3.6.0-rc5-00092-g9b0b493-dirty #6111) PC is at kfree+0x148/0x158 LR is at s3c64xx_spi_setup+0xac/0x290 pc : []lr : []psr: 4013 sp : ee043e10 ip : c032883c fp : c0481f7c r10: ee0abd80 r9 : 0063 r8 : r7 : ee129e78 r6 : ee104a00 r5 : fff0 r4 : c047bc64 r3 : 4400 r2 : c047bc64 r1 : c04def60 r0 : 0004047b Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c5387d Table: 4000404a DAC: 0015 Process swapper/0 (pid: 1, stack limit = 0xee0422f0) Stack: (0xee043e10 to 0xee044000) ... [] (kfree+0x148/0x158) from [] (s3c64xx_spi_setup+0xac/0x290) [] (s3c64xx_spi_setup+0xac/0x290) from [] (spi_setup+0x34/0x4c) [] (spi_setup+0x34/0x4c) from [] (spi_add_device+0x98/0x128) [] (spi_add_device+0x98/0x128) from [] (spi_new_device+0x74/0xa8) [] (spi_new_device+0x74/0xa8) from [] (spi_match_master_to_boardinfo+0x24/0x44) [] (spi_match_master_to_boardinfo+0x24/0x44) from [] (spi_register_master+0xf4/0x2a8) [] (spi_register_master+0xf4/0x2a8) from [] (s3c64xx_spi_probe+0x34c/0x42c) [] (s3c64xx_spi_probe+0x34c/0x42c) from [] (platform_drv_probe+0x18/0x1c) There should be no attempt to kfree controller_data when it was externally provided through the board code. Fix this by freeing controller_data only when dev->of_node is not null. Signed-off-by: Sylwester Nawrocki Signed-off-by: Kyungmin Park --- drivers/spi/spi-s3c64xx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index d1c8441f..7f75d4e 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -976,7 +976,8 @@ err_msgq: spi_set_ctldata(spi, NULL); err_gpio_req: - kfree(cs); + if (spi->dev.of_node) + kfree(cs); return err; } -- 1.7.11.3 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
