| Message ID | 20230730202240.898519-1-absicsz@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | bus: omap_l3_smx: identify timeout source before rebooting | expand |
* Sicelo A. Mhlongo <absicsz@gmail.com> [230730 20:23]: > Identify and print the error source before rebooting the board due to an l3 > application timeout error, by delaying the BUG_ON. This is helpful when > debugging, e.g. via serial. Makes sense to try to show some information, but please see the question below. > diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c > index bb1606f5ce2d..70f4903d5468 100644 > --- a/drivers/bus/omap_l3_smx.c > +++ b/drivers/bus/omap_l3_smx.c > @@ -170,11 +170,9 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) > status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); > /* > * if we have a timeout error, there's nothing we can > - * do besides rebooting the board. So let's BUG on any > - * of such errors and handle the others. timeout error > - * is severe and not expected to occur. > + * do besides rebooting the board after identifying the > + * error source. > */ > - BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); > } else { > status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); > /* No timeout error for debug sources */ > @@ -190,6 +188,12 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) > ret |= omap3_l3_block_irq(l3, error, error_addr); > } > > + /* > + * BUG on application timeout errors since they are severe and not > + * expected to occur. > + */ > + BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); Aren't you now checking the bit for both L3_SI_FLAG_STATUS_0 and L3_SI_FLAG_STATUS_1 register values? I think it should be only for register L3_SI_FLAG_STATUS_0 value? Regards, Tony
Hi, On Mon, Jul 31, 2023 at 08:29:04AM +0300, Tony Lindgren wrote: > * Sicelo A. Mhlongo <absicsz@gmail.com> [230730 20:23]: > > Identify and print the error source before rebooting the board due to an l3 > > application timeout error, by delaying the BUG_ON. This is helpful when > > debugging, e.g. via serial. > > Makes sense to try to show some information, but please see the question > below. > > > diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c > > index bb1606f5ce2d..70f4903d5468 100644 > > --- a/drivers/bus/omap_l3_smx.c > > +++ b/drivers/bus/omap_l3_smx.c > > @@ -170,11 +170,9 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) > > status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); > > /* > > * if we have a timeout error, there's nothing we can > > - * do besides rebooting the board. So let's BUG on any > > - * of such errors and handle the others. timeout error > > - * is severe and not expected to occur. > > + * do besides rebooting the board after identifying the > > + * error source. > > */ > > - BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); > > } else { > > status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); > > /* No timeout error for debug sources */ > > @@ -190,6 +188,12 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) > > ret |= omap3_l3_block_irq(l3, error, error_addr); > > } > > > > + /* > > + * BUG on application timeout errors since they are severe and not > > + * expected to occur. > > + */ > > + BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); > > Aren't you now checking the bit for both L3_SI_FLAG_STATUS_0 and > L3_SI_FLAG_STATUS_1 register values? I think it should be only for register > L3_SI_FLAG_STATUS_0 value? > Ah, you are right. It should be: `BUG_ON(!int_type && status & L3_STATUS_0_TIMEOUT_MASK);` I'll send in a v2. Thanks Sicelo
diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c index bb1606f5ce2d..70f4903d5468 100644 --- a/drivers/bus/omap_l3_smx.c +++ b/drivers/bus/omap_l3_smx.c @@ -170,11 +170,9 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); /* * if we have a timeout error, there's nothing we can - * do besides rebooting the board. So let's BUG on any - * of such errors and handle the others. timeout error - * is severe and not expected to occur. + * do besides rebooting the board after identifying the + * error source. */ - BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); } else { status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); /* No timeout error for debug sources */ @@ -190,6 +188,12 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) ret |= omap3_l3_block_irq(l3, error, error_addr); } + /* + * BUG on application timeout errors since they are severe and not + * expected to occur. + */ + BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); + /* Clear the status register */ clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) | L3_AGENT_STATUS_CLEAR_TA;
Identify and print the error source before rebooting the board due to an l3 application timeout error, by delaying the BUG_ON. This is helpful when debugging, e.g. via serial. Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com> --- drivers/bus/omap_l3_smx.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)