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usb-ccid: make ccid_write_data_block() cope with null buffers

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static code analyzer complain:

hw/usb/dev-smartcard-reader.c:816:5: warning: Null pointer passed as an argument to a 'nonnull' parameter
    memcpy(p->abData, data, len);
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Clang Static Analyzer
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Philippe Mathieu-Daudé 2017-04-07 19:20:13 -03:00 • committed by Michael Tokarev
parent 46bbbec2d3
commit 6b1de1484e
1 changed files with 4 additions and 1 deletions
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3
hw/usb/dev-smartcard-reader.c
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@ -813,7 +813,10 @@ static void ccid_write_data_block(USBCCIDState *s, uint8_t slot, uint8_t seq,
if (p->b.bError) {
DPRINTF(s, D_VERBOSE, "error %d\n", p->b.bError);
}
if (len) {
g_assert_nonnull(data);
memcpy(p->abData, data, len);
}
ccid_reset_error_status(s);
usb_wakeup(s->bulk, 0);
}