Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Sat, Jan 22, 2011 at 6:33 AM, Kevin Hilman khil...@ti.com wrote: G, Manjunath Kondaiah manj...@ti.com writes: On Fri, Jan 21, 2011 at 12:54:29PM +0530, Govindraj wrote: On Thu, Jan 20, 2011 at 5:49 PM, Anand Gadiyar gadi...@ti.com wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? Actually I was using teraterm on windows platform. using keyboard to send a break char [alt + b] sometimes i observed that first break char was getting lost and subsequent break chars where getting recognized. However using send break option from terterm menu seems to work most of times. my change can be dropped. If it is fixing the issue of losing first break character, what is wrong in having this patch? Do you see any other issues because of this change? Were you loosing the first break character because of PM? i.e., if the OMAP is in retention or off while idle, we will always loose the first character. The first character causes the wakeup, but does not make it to the UART. No, even without PM i.e., even without setting sleep_while_idle and timeouts for uart I observed on windows-teraterm sometimes first break char was getting lost. -- Thanks, Govindraj.R -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Fri, Jan 21, 2011 at 1:15 PM, G, Manjunath Kondaiah manj...@ti.com wrote: On Fri, Jan 21, 2011 at 12:54:29PM +0530, Govindraj wrote: On Thu, Jan 20, 2011 at 5:49 PM, Anand Gadiyar gadi...@ti.com wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? Actually I was using teraterm on windows platform. using keyboard to send a break char [alt + b] sometimes i observed that first break char was getting lost and subsequent break chars where getting recognized. However using send break option from terterm menu seems to work most of times. my change can be dropped. If it is fixing the issue of losing first break character, what is wrong in having this patch? Do you see any other issues because of this change? Haven't seen any thing else. Will leave it to Thomas to incorporate if he is willing to take up the change else will post out this change some time later. -- Thanks, Govindraj.R -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
G, Manjunath Kondaiah manj...@ti.com writes: On Fri, Jan 21, 2011 at 12:54:29PM +0530, Govindraj wrote: On Thu, Jan 20, 2011 at 5:49 PM, Anand Gadiyar gadi...@ti.com wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? Actually I was using teraterm on windows platform. using keyboard to send a break char [alt + b] sometimes i observed that first break char was getting lost and subsequent break chars where getting recognized. However using send break option from terterm menu seems to work most of times. my change can be dropped. If it is fixing the issue of losing first break character, what is wrong in having this patch? Do you see any other issues because of this change? Were you loosing the first break character because of PM? i.e., if the OMAP is in retention or off while idle, we will always loose the first character. The first character causes the wakeup, but does not make it to the UART. Is the first break character lost if sleep_while_idle == 0? Kevin -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Wed, Jan 19, 2011 at 07:28:20PM +0530, Govindraj wrote:
On Wed, Jan 19, 2011 at 7:01 PM, Thomas Weber we...@corscience.de wrote:
Am 19.01.2011 14:00, schrieb G, Manjunath Kondaiah:
On Wed, Jan 19, 2011 at 03:01:39PM +0530, Govindraj wrote:
On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote:
Magic SysRq key is not working for OMAP on new serial
console ttyOx because SUPPORT_SYSRQ is not defined
for omap-serial.
This patch defines SUPPORT_SYSRQ in omap-serial and
enables handling of Magic SysRq character.
Signed-off-by: Thomas Weber we...@corscience.de
Looks fine to me.
Acked-by: Govindraj.R govindraj.r...@ti.com
I tried to use SysRq key on minicom after applying this patch, it looks
like it is not triggering sysrq event.
Am I missing anything?
-Manjunath
--
Hello Manjunath,
Do you have CONFIG_MAGIC_SYSRQ enabled?
Magic SysRq key in Kernel Hacking
I tested it on Devkit8000 (beagle board clone).
re-setting lsr_break_flag to 0 in receive chars is causing issues
in getting sysrq key break sequence on omap-serial.c
Manju,
can you try this change on your environment.
With below change works for me on 3430SDP/4430SDP.
key sequence I checked.
[alt + b + t] = shows trace of tasks running.
[alt + b + b] = system reboot.
With below patch, it works fine on TeraTerm. However, I am not able to
perform the same on minicom.
Tested-by: Manjunath G Kondaiah manj...@ti.com
-Manjunath
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c
index 1201eff..6df623e 100644
--- a/drivers/serial/omap-serial.c
+++ b/drivers/serial/omap-serial.c
@@ -20,6 +20,10 @@
* this driver as required for the omap-platform.
*/
+#if defined(CONFIG_SERIAL_OMAP_CONSOLE) defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
#include linux/module.h
#include linux/init.h
#include linux/console.h
@@ -190,7 +194,6 @@ static inline void receive_chars(struct
uart_omap_port *up, int *status)
if (up-port.line == up-port.cons-index) {
/* Recover the break flag from console xmit */
lsr |= up-lsr_break_flag;
- up-lsr_break_flag = 0;
}
#endif
if (lsr UART_LSR_BI)
--
Thanks,
Govindraj.R
--
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RE: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? - Anand -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Thu, Jan 20, 2011 at 5:49 PM, Anand Gadiyar gadi...@ti.com wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? Actually I was using teraterm on windows platform. using keyboard to send a break char [alt + b] sometimes i observed that first break char was getting lost and subsequent break chars where getting recognized. However using send break option from terterm menu seems to work most of times. my change can be dropped. -- Thanks, Govindraj.R -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Fri, Jan 21, 2011 at 12:54:29PM +0530, Govindraj wrote: On Thu, Jan 20, 2011 at 5:49 PM, Anand Gadiyar gadi...@ti.com wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). re-setting lsr_break_flag to 0 in receive chars is causing issues in getting sysrq key break sequence on omap-serial.c Manju, can you try this change on your environment. With below change works for me on 3430SDP/4430SDP. key sequence I checked. [alt + b + t] = shows trace of tasks running. [alt + b + b] = system reboot. With below patch, it works fine on TeraTerm. However, I am not able to perform the same on minicom. Tested-by: Manjunath G Kondaiah manj...@ti.com -Manjunath Not sure what you guys are trying out, but I am able to use sysrq just fine in minicom (using only Thomas' original patch) - you need to send a break sequence, and the way to do this in minicom is to do Ctrl-A followed by F. Works for me, without the resetting lsr_break_flag to 0 part. @Govind, What are the issues you see in getting sysrq key break sequence without your change? And how is your change fixing this? Actually I was using teraterm on windows platform. using keyboard to send a break char [alt + b] sometimes i observed that first break char was getting lost and subsequent break chars where getting recognized. However using send break option from terterm menu seems to work most of times. my change can be dropped. If it is fixing the issue of losing first break character, what is wrong in having this patch? Do you see any other issues because of this change? -Manjunath -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de --- Changes from v1: Changed comment drivers/serial/omap-serial.c |4 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c index 1201eff..907be9b 100644 --- a/drivers/serial/omap-serial.c +++ b/drivers/serial/omap-serial.c @@ -20,6 +20,10 @@ * this driver as required for the omap-platform. */ +#if defined(CONFIG_SERIAL_OMAP_CONSOLE) defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + #include linux/module.h #include linux/init.h #include linux/console.h -- 1.7.4.rc2 -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com --- Changes from v1: Changed comment drivers/serial/omap-serial.c | 4 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c index 1201eff..907be9b 100644 --- a/drivers/serial/omap-serial.c +++ b/drivers/serial/omap-serial.c @@ -20,6 +20,10 @@ * this driver as required for the omap-platform. */ +#if defined(CONFIG_SERIAL_OMAP_CONSOLE) defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + #include linux/module.h #include linux/init.h #include linux/console.h -- 1.7.4.rc2 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Wed, Jan 19, 2011 at 03:01:39PM +0530, Govindraj wrote: On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
Am 19.01.2011 14:00, schrieb G, Manjunath Kondaiah: On Wed, Jan 19, 2011 at 03:01:39PM +0530, Govindraj wrote: On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote: Magic SysRq key is not working for OMAP on new serial console ttyOx because SUPPORT_SYSRQ is not defined for omap-serial. This patch defines SUPPORT_SYSRQ in omap-serial and enables handling of Magic SysRq character. Signed-off-by: Thomas Weber we...@corscience.de Looks fine to me. Acked-by: Govindraj.R govindraj.r...@ti.com I tried to use SysRq key on minicom after applying this patch, it looks like it is not triggering sysrq event. Am I missing anything? -Manjunath -- Hello Manjunath, Do you have CONFIG_MAGIC_SYSRQ enabled? Magic SysRq key in Kernel Hacking I tested it on Devkit8000 (beagle board clone). Thomas -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
On Wed, Jan 19, 2011 at 7:01 PM, Thomas Weber we...@corscience.de wrote:
Am 19.01.2011 14:00, schrieb G, Manjunath Kondaiah:
On Wed, Jan 19, 2011 at 03:01:39PM +0530, Govindraj wrote:
On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote:
Magic SysRq key is not working for OMAP on new serial
console ttyOx because SUPPORT_SYSRQ is not defined
for omap-serial.
This patch defines SUPPORT_SYSRQ in omap-serial and
enables handling of Magic SysRq character.
Signed-off-by: Thomas Weber we...@corscience.de
Looks fine to me.
Acked-by: Govindraj.R govindraj.r...@ti.com
I tried to use SysRq key on minicom after applying this patch, it looks
like it is not triggering sysrq event.
Am I missing anything?
-Manjunath
--
Hello Manjunath,
Do you have CONFIG_MAGIC_SYSRQ enabled?
Magic SysRq key in Kernel Hacking
I tested it on Devkit8000 (beagle board clone).
re-setting lsr_break_flag to 0 in receive chars is causing issues
in getting sysrq key break sequence on omap-serial.c
Manju,
can you try this change on your environment.
With below change works for me on 3430SDP/4430SDP.
key sequence I checked.
[alt + b + t] = shows trace of tasks running.
[alt + b + b] = system reboot.
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c
index 1201eff..6df623e 100644
--- a/drivers/serial/omap-serial.c
+++ b/drivers/serial/omap-serial.c
@@ -20,6 +20,10 @@
* this driver as required for the omap-platform.
*/
+#if defined(CONFIG_SERIAL_OMAP_CONSOLE) defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
#include linux/module.h
#include linux/init.h
#include linux/console.h
@@ -190,7 +194,6 @@ static inline void receive_chars(struct
uart_omap_port *up, int *status)
if (up-port.line == up-port.cons-index) {
/* Recover the break flag from console xmit */
lsr |= up-lsr_break_flag;
- up-lsr_break_flag = 0;
}
#endif
if (lsr UART_LSR_BI)
--
Thanks,
Govindraj.R
--
To unsubscribe from this list: send the line unsubscribe linux-omap in
the body of a message to majord...@vger.kernel.org
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Re: [PATCHv2] OMAP: Enable Magic SysRq on serial console ttyOx
Am 19.01.2011 14:58, schrieb Govindraj:
On Wed, Jan 19, 2011 at 7:01 PM, Thomas Weber we...@corscience.de wrote:
Am 19.01.2011 14:00, schrieb G, Manjunath Kondaiah:
On Wed, Jan 19, 2011 at 03:01:39PM +0530, Govindraj wrote:
On Wed, Jan 19, 2011 at 2:11 PM, Thomas Weber we...@corscience.de wrote:
Magic SysRq key is not working for OMAP on new serial
console ttyOx because SUPPORT_SYSRQ is not defined
for omap-serial.
This patch defines SUPPORT_SYSRQ in omap-serial and
enables handling of Magic SysRq character.
Signed-off-by: Thomas Weber we...@corscience.de
Looks fine to me.
Acked-by: Govindraj.R govindraj.r...@ti.com
I tried to use SysRq key on minicom after applying this patch, it looks
like it is not triggering sysrq event.
Am I missing anything?
-Manjunath
--
Hello Manjunath,
Do you have CONFIG_MAGIC_SYSRQ enabled?
Magic SysRq key in Kernel Hacking
I tested it on Devkit8000 (beagle board clone).
re-setting lsr_break_flag to 0 in receive chars is causing issues
in getting sysrq key break sequence on omap-serial.c
Manju,
can you try this change on your environment.
With below change works for me on 3430SDP/4430SDP.
key sequence I checked.
[alt + b + t] = shows trace of tasks running.
[alt + b + b] = system reboot.
diff --git a/drivers/serial/omap-serial.c b/drivers/serial/omap-serial.c
index 1201eff..6df623e 100644
--- a/drivers/serial/omap-serial.c
+++ b/drivers/serial/omap-serial.c
@@ -20,6 +20,10 @@
* this driver as required for the omap-platform.
*/
+#if defined(CONFIG_SERIAL_OMAP_CONSOLE) defined(CONFIG_MAGIC_SYSRQ)
+#define SUPPORT_SYSRQ
+#endif
+
#include linux/module.h
#include linux/init.h
#include linux/console.h
@@ -190,7 +194,6 @@ static inline void receive_chars(struct
uart_omap_port *up, int *status)
if (up-port.line == up-port.cons-index) {
/* Recover the break flag from console xmit */
lsr |= up-lsr_break_flag;
- up-lsr_break_flag = 0;
}
#endif
if (lsr UART_LSR_BI)
--
Thanks,
Govindraj.R
--
Hello,
both version works for me.
Thomas
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