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usb: isp1760: check maxpacketsize before using it 

When checking if we need one more packet on a bulk pipe we may, even
though not probable at all, get there with a zero maxpacketsize.
In that case for sure no packet, no even a one more, will be
allocated.

This will clean the clang-analyzer warning:
drivers/usb/isp1760/isp1760-hcd.c:1856:38: warning: Division by zero [clang-analyzer-core.DivideZero]
                                && !(urb->transfer_buffer_length %

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Link: https://lore.kernel.org/r/20210819180929.1327349-3-rui.silva@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rui Miguel Silva 2021-08-19 19:09:26 +01:00 committed by Greg Kroah-Hartman
parent 8472896f39
commit 8e58b7710d
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/isp1760/isp1760-hcd.c
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@ -1854,7 +1854,7 @@ static void packetize_urb(struct usb_hcd *hcd,
packet_type = OUT_PID;
else
packet_type = IN_PID;
} else if (usb_pipebulk(urb->pipe)
} else if (usb_pipebulk(urb->pipe) && maxpacketsize
&& (urb->transfer_flags & URB_ZERO_PACKET)
&& !(urb->transfer_buffer_length %
maxpacketsize)) {