Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932182AbZJBBiH (ORCPT ); Thu, 1 Oct 2009 21:38:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932138AbZJBBiD (ORCPT ); Thu, 1 Oct 2009 21:38:03 -0400 Received: from kroah.org ([198.145.64.141]:33575 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756571AbZJBBeU (ORCPT ); Thu, 1 Oct 2009 21:34:20 -0400 X-Mailbox-Line: From gregkh@mini.kroah.org Thu Oct 1 18:24:26 2009 Message-Id: <20091002012426.763825542@mini.kroah.org> User-Agent: quilt/0.48-1 Date: Thu, 01 Oct 2009 18:17:53 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Mauro Carvalho Chehab , Brian Rogers , linux-media@vger.kernel.org Subject: [125/136] em28xx: ir-kbd-i2c init data needs a persistent object References: <20091002011548.335611824@mini.kroah.org> Content-Disposition: inline; filename=em28xx-ir-kbd-i2c-init-data-needs-a-persistent-object.patch In-Reply-To: <20091002012911.GA18542@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4466 Lines: 113 2.6.31-stable review patch. If anyone has any objections, please let us know. ------------------ From: Brian Rogers 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(-) --- 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 em28 /* ----------------------------------------------------------------------- */ 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 em28x 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 em28x 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 em28x 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) --- 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 { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/