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[ncm] Respect maximum transfer size of the bus

Signed-off-by: Michael Brown <mcb30@ipxe.org>
tags/v1.20.1
Michael Brown 9 vuotta sitten
vanhempi
commit
74f57016dc
1 muutettua tiedostoa jossa 3 lisäystä ja 0 poistoa
  1. 3
    0
      src/drivers/net/ncm.c

+ 3
- 0
src/drivers/net/ncm.c Näytä tiedosto

@@ -157,6 +157,7 @@ static struct usb_endpoint_driver_operations ncm_intr_operations = {
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  * @ret rc		Return status code
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  */
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 static int ncm_in_prefill ( struct ncm_device *ncm ) {
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+	struct usb_bus *bus = ncm->bus;
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 	size_t mtu;
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 	unsigned int count;
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 	int rc;
@@ -178,6 +179,8 @@ static int ncm_in_prefill ( struct ncm_device *ncm ) {
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 		/* Attempt allocation at this MTU */
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 		if ( mtu > NCM_MAX_NTB_INPUT_SIZE )
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 			continue;
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+		if ( mtu > bus->mtu )
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+			continue;
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 		count = ( NCM_IN_MIN_SIZE / mtu );
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 		if ( count < NCM_IN_MIN_COUNT )
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 			count = NCM_IN_MIN_COUNT;

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