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bus: omap_l3_smx: identify timeout cause before rebooting

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Identify and print the error source before rebooting the board due to an l3
timeout error. This is helpful when debugging, e.g. via serial.

Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Message-ID: <20230801192240.1063764-1-absicsz@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Sicelo A. Mhlongo 2023-08-01 21:22:40 +02:00 committed by Tony Lindgren
parent 06c2afb862
commit 99f13d7a16
1 changed files with 10 additions and 11 deletions
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21
drivers/bus/omap_l3_smx.c
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@ -166,19 +166,10 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
irqreturn_t ret = IRQ_NONE;
int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
if (!int_type) {
if (!int_type)
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.
*/
BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK);
} else {
else
status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1);
/* No timeout error for debug sources */
}
/* identify the error source */
err_source = __ffs(status);
@ -190,6 +181,14 @@ static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
ret |= omap3_l3_block_irq(l3, error, error_addr);
}
/*
* 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.
*/
BUG_ON(!int_type && status & L3_STATUS_0_TIMEOUT_MASK);
/* Clear the status register */
clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) |
L3_AGENT_STATUS_CLEAR_TA;