From 45af991d4e6a44e663c1314545e53bfae91bde68 Mon Sep 17 00:00:00 2001 From: Brian Rogers Date: Wed, 23 Sep 2009 03:05:02 -0700 Subject: [PATCH] em28xx: ir-kbd-i2c init data needs a persistent object commit d2ebd0f806fdb6104903365e355675934eec22b2 upstream. Original commit message: ir-kbd-i2c's ir_probe() function can be called much later (i.e. at ir-kbd-i2c module load), than the lifetime of a struct IR_i2c_init_data allocated off of the stack in cx18_i2c_new_ir() at registration time. Make sure we pass a pointer to a persistent IR_i2c_init_data object at i2c registration time. Thanks to Brian Rogers, Dustin Mitchell, Andy Walls and Jean Delvare to rise this question. Before this patch, if ir-kbd-i2c were probed after em28xx, trash data were used. After the patch, no matter what order, it is properly reported as tested by me: input: i2c IR (i2c IR (EM2840 Hauppaug as /class/input/input10 ir-kbd-i2c: i2c IR (i2c IR (EM2840 Hauppaug detected at i2c-4/4-0030/ir0 [em28xx #0] Original-patch-by: Mauro Carvalho Chehab Signed-off-by: Mauro Carvalho Chehab [brian@xyzw.org: backported for 2.6.31] Signed-off-by: Brian Rogers Signed-off-by: Greg Kroah-Hartman --- drivers/media/video/em28xx/em28xx-cards.c | 32 +++++++++++++++---------------- drivers/media/video/em28xx/em28xx.h | 4 ++++ 2 files changed, 19 insertions(+), 17 deletions(-) diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c index 1c2e544eda7..ffe9306f5bb 100644 --- a/drivers/media/video/em28xx/em28xx-cards.c +++ b/drivers/media/video/em28xx/em28xx-cards.c @@ -2170,8 +2170,6 @@ static int em28xx_hint_board(struct em28xx *dev) /* ----------------------------------------------------------------------- */ void em28xx_register_i2c_ir(struct em28xx *dev) { - struct i2c_board_info info; - struct IR_i2c_init_data init_data; const unsigned short addr_list[] = { 0x30, 0x47, I2C_CLIENT_END }; @@ -2179,9 +2177,9 @@ void em28xx_register_i2c_ir(struct em28xx *dev) if (disable_ir) return; - memset(&info, 0, sizeof(struct i2c_board_info)); - memset(&init_data, 0, sizeof(struct IR_i2c_init_data)); - strlcpy(info.type, "ir_video", I2C_NAME_SIZE); + memset(&dev->info, 0, sizeof(&dev->info)); + memset(&dev->init_data, 0, sizeof(dev->init_data)); + strlcpy(dev->info.type, "ir_video", I2C_NAME_SIZE); /* detect & configure */ switch (dev->model) { @@ -2191,19 +2189,19 @@ void em28xx_register_i2c_ir(struct em28xx *dev) break; case (EM2800_BOARD_TERRATEC_CINERGY_200): case (EM2820_BOARD_TERRATEC_CINERGY_250): - init_data.ir_codes = ir_codes_em_terratec; - init_data.get_key = em28xx_get_key_terratec; - init_data.name = "i2c IR (EM28XX Terratec)"; + dev->init_data.ir_codes = ir_codes_em_terratec; + dev->init_data.get_key = em28xx_get_key_terratec; + dev->init_data.name = "i2c IR (EM28XX Terratec)"; break; case (EM2820_BOARD_PINNACLE_USB_2): - init_data.ir_codes = ir_codes_pinnacle_grey; - init_data.get_key = em28xx_get_key_pinnacle_usb_grey; - init_data.name = "i2c IR (EM28XX Pinnacle PCTV)"; + dev->init_data.ir_codes = ir_codes_pinnacle_grey; + dev->init_data.get_key = em28xx_get_key_pinnacle_usb_grey; + dev->init_data.name = "i2c IR (EM28XX Pinnacle PCTV)"; break; case (EM2820_BOARD_HAUPPAUGE_WINTV_USB_2): - init_data.ir_codes = ir_codes_hauppauge_new; - init_data.get_key = em28xx_get_key_em_haup; - init_data.name = "i2c IR (EM2840 Hauppauge)"; + dev->init_data.ir_codes = ir_codes_hauppauge_new; + dev->init_data.get_key = em28xx_get_key_em_haup; + dev->init_data.name = "i2c IR (EM2840 Hauppauge)"; break; case (EM2820_BOARD_MSI_VOX_USB_2): break; @@ -2215,9 +2213,9 @@ void em28xx_register_i2c_ir(struct em28xx *dev) break; } - if (init_data.name) - info.platform_data = &init_data; - i2c_new_probed_device(&dev->i2c_adap, &info, addr_list); + if (dev->init_data.name) + dev->info.platform_data = &dev->init_data; + i2c_new_probed_device(&dev->i2c_adap, &dev->info, addr_list); } void em28xx_card_setup(struct em28xx *dev) diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index a2add61f7d5..cb2a70a59a0 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -595,6 +595,10 @@ struct em28xx { struct delayed_work sbutton_query_work; struct em28xx_dvb *dvb; + + /* I2C keyboard data */ + struct i2c_board_info info; + struct IR_i2c_init_data init_data; }; struct em28xx_ops { -- 2.11.4.GIT