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Subject[126/136] saa7134: ir-kbd-i2c init data needs a persistent object
2.6.31-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Brian Rogers <brian@xyzw.org>

commit 7aedd5ec87686c557d48584d69ad880c11a0984d upstream.

Tested on MSI TV@nywhere Plus.

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 SAA7134, trash data
were used.

Compile tested only, but the patch is identical to em28xx one. So, it
should work properly.

Original-patch-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
[brian@xyzw.org: backported for 2.6.31]
Signed-off-by: Brian Rogers <brian@xyzw.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/media/video/saa7134/saa7134-input.c | 56 +++++++++++++---------------
drivers/media/video/saa7134/saa7134.h | 4 ++
2 files changed, 31 insertions(+), 29 deletions(-)

--- a/drivers/media/video/saa7134/saa7134.h
+++ b/drivers/media/video/saa7134/saa7134.h
@@ -584,6 +584,10 @@ struct saa7134_dev {
int nosignal;
unsigned int insuspend;

+ /* I2C keyboard data */
+ struct i2c_board_info info;
+ struct IR_i2c_init_data init_data;
+
/* SAA7134_MPEG_* */
struct saa7134_ts ts;
struct saa7134_dmaqueue ts_q;
--- a/drivers/media/video/saa7134/saa7134-input.c
+++ b/drivers/media/video/saa7134/saa7134-input.c
@@ -684,8 +684,6 @@ void saa7134_input_fini(struct saa7134_d

void saa7134_probe_i2c_ir(struct saa7134_dev *dev)
{
- struct i2c_board_info info;
- struct IR_i2c_init_data init_data;
const unsigned short addr_list[] = {
0x7a, 0x47, 0x71, 0x2d,
I2C_CLIENT_END
@@ -705,32 +703,32 @@ void saa7134_probe_i2c_ir(struct saa7134
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);

switch (dev->board) {
case SAA7134_BOARD_PINNACLE_PCTV_110i:
case SAA7134_BOARD_PINNACLE_PCTV_310i:
- init_data.name = "Pinnacle PCTV";
+ dev->init_data.name = "Pinnacle PCTV";
if (pinnacle_remote == 0) {
- init_data.get_key = get_key_pinnacle_color;
- init_data.ir_codes = ir_codes_pinnacle_color;
+ dev->init_data.get_key = get_key_pinnacle_color;
+ dev->init_data.ir_codes = ir_codes_pinnacle_color;
} else {
- init_data.get_key = get_key_pinnacle_grey;
- init_data.ir_codes = ir_codes_pinnacle_grey;
+ dev->init_data.get_key = get_key_pinnacle_grey;
+ dev->init_data.ir_codes = ir_codes_pinnacle_grey;
}
break;
case SAA7134_BOARD_UPMOST_PURPLE_TV:
- init_data.name = "Purple TV";
- init_data.get_key = get_key_purpletv;
- init_data.ir_codes = ir_codes_purpletv;
+ dev->init_data.name = "Purple TV";
+ dev->init_data.get_key = get_key_purpletv;
+ dev->init_data.ir_codes = ir_codes_purpletv;
break;
case SAA7134_BOARD_MSI_TVATANYWHERE_PLUS:
- init_data.name = "MSI TV@nywhere Plus";
- init_data.get_key = get_key_msi_tvanywhere_plus;
- init_data.ir_codes = ir_codes_msi_tvanywhere_plus;
- info.addr = 0x30;
+ dev->init_data.name = "MSI TV@nywhere Plus";
+ dev->init_data.get_key = get_key_msi_tvanywhere_plus;
+ dev->init_data.ir_codes = ir_codes_msi_tvanywhere_plus;
+ dev->info.addr = 0x30;
/* MSI TV@nywhere Plus controller doesn't seem to
respond to probes unless we read something from
an existing device. Weird...
@@ -741,9 +739,9 @@ void saa7134_probe_i2c_ir(struct saa7134
(1 == rc) ? "yes" : "no");
break;
case SAA7134_BOARD_HAUPPAUGE_HVR1110:
- init_data.name = "HVR 1110";
- init_data.get_key = get_key_hvr1110;
- init_data.ir_codes = ir_codes_hauppauge_new;
+ dev->init_data.name = "HVR 1110";
+ dev->init_data.get_key = get_key_hvr1110;
+ dev->init_data.ir_codes = ir_codes_hauppauge_new;
break;
case SAA7134_BOARD_BEHOLD_607FM_MK3:
case SAA7134_BOARD_BEHOLD_607FM_MK5:
@@ -757,26 +755,26 @@ void saa7134_probe_i2c_ir(struct saa7134
case SAA7134_BOARD_BEHOLD_M63:
case SAA7134_BOARD_BEHOLD_M6_EXTRA:
case SAA7134_BOARD_BEHOLD_H6:
- init_data.name = "BeholdTV";
- init_data.get_key = get_key_beholdm6xx;
- init_data.ir_codes = ir_codes_behold;
+ dev->init_data.name = "BeholdTV";
+ dev->init_data.get_key = get_key_beholdm6xx;
+ dev->init_data.ir_codes = ir_codes_behold;
break;
case SAA7134_BOARD_AVERMEDIA_CARDBUS_501:
case SAA7134_BOARD_AVERMEDIA_CARDBUS_506:
- info.addr = 0x40;
+ dev->info.addr = 0x40;
break;
}

- if (init_data.name)
- info.platform_data = &init_data;
+ if (dev->init_data.name)
+ dev->info.platform_data = &dev->init_data;
/* No need to probe if address is known */
- if (info.addr) {
- i2c_new_device(&dev->i2c_adap, &info);
+ if (dev->info.addr) {
+ i2c_new_device(&dev->i2c_adap, &dev->info);
return;
}

/* Address not known, fallback to probing */
- i2c_new_probed_device(&dev->i2c_adap, &info, addr_list);
+ i2c_new_probed_device(&dev->i2c_adap, &dev->info, addr_list);
}

static int saa7134_rc5_irq(struct saa7134_dev *dev)



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