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USB: pxa27x_udc: avoid compiler warnings and misbehavior on buggy hardware
hardware reports wrong interrupt. Although such a situation should not happen, the compiler complains about this access. This patch adds a sanity check and generates warning to detect such issues. Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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1 changed files with 13 additions and 6 deletions
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@ -2218,9 +2218,13 @@ static void irq_handle_data(int irq, struct pxa_udc *udc)
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continue;
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udc_writel(udc, UDCISR0, UDCISR_INT(i, UDCISR_INT_MASK));
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ep = &udc->pxa_ep[i];
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ep->stats.irqs++;
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handle_ep(ep);
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WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep));
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if (i < ARRAY_SIZE(udc->pxa_ep)) {
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ep = &udc->pxa_ep[i];
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ep->stats.irqs++;
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handle_ep(ep);
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}
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}
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for (i = 16; udcisr1 != 0 && i < 24; udcisr1 >>= 2, i++) {
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@ -2228,9 +2232,12 @@ static void irq_handle_data(int irq, struct pxa_udc *udc)
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if (!(udcisr1 & UDCISR_INT_MASK))
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continue;
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ep = &udc->pxa_ep[i];
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ep->stats.irqs++;
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handle_ep(ep);
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WARN_ON(i >= ARRAY_SIZE(udc->pxa_ep));
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if (i < ARRAY_SIZE(udc->pxa_ep)) {
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ep = &udc->pxa_ep[i];
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ep->stats.irqs++;
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handle_ep(ep);
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}
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}
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}
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