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staging: unisys: visornic: convert BUG_ON to dev_err() message
The caller of visor_copy_fragsinfo_from_skb() is prepared to log a dev_err() message if it fails (by returning a negative value), so we now just fail in the one occasion where visor_copy_fragsinfo_from_skb() was doing a BUG_ON. There was also a problem before where visor_copy_fragsinfo_from_skb() was returning a negative to indicate error, yet it was declared to return an unsigned value! So obviously that needed correcting too. Signed-off-by: Tim Sell <Timothy.Sell@unisys.com> Signed-off-by: David Kershner <david.kershner@unisys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 3 additions and 5 deletions
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@ -209,7 +209,7 @@ static void poll_for_irq(unsigned long v);
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* Return value indicates number of entries filled in frags
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* Negative values indicate an error.
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*/
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static unsigned int
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static int
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visor_copy_fragsinfo_from_skb(struct sk_buff *skb, unsigned int firstfraglen,
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unsigned int frags_max,
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struct phys_info frags[])
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@ -269,11 +269,9 @@ visor_copy_fragsinfo_from_skb(struct sk_buff *skb, unsigned int firstfraglen,
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* zero if the frags array is out of room
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* That should never happen because we
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* fail above, if count+numfrags > frags_max.
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* Given that theres no recovery mechanism from putting
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* half a packet in the I/O channel, panic here as this
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* should never happen
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*/
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BUG_ON(!count);
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if (!count)
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return -EINVAL;
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}
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}
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if (skb_shinfo(skb)->frag_list) {
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