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s390: avoid always-true comparison in s390_pci_generate_fid() 

Coverity points out that the comparison "fid <= ZPCI_MAX_FID"
in s390_pci_generate_fid() is always true (because fid
is 32 bits and ZPCI_MAX_FID is 0xffffffff). This isn't a
bug because the real loop termination condition is
expressed later via an "if (...) break;" inside the loop,
but it is a bit odd. Rephrase the loop to avoid the
unnecessary duplicate-but-never-true conditional.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Peter Maydell 2016-10-20 13:57:06 +01:00 committed by Michael Tokarev
parent 25174055f4
commit 35b6e94ba5
1 changed files with 2 additions and 8 deletions
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10
hw/s390x/s390-pci-bus.c
View File

@ -809,17 +809,11 @@ static uint32_t s390_pci_generate_fid(Error **errp)
{ {
uint32_t fid = 0; uint32_t fid = 0;
while (fid <= ZPCI_MAX_FID) { do {
if (!s390_pci_find_dev_by_fid(fid)) { if (!s390_pci_find_dev_by_fid(fid)) {
return fid; return fid;
} }
} while (fid++ != ZPCI_MAX_FID);
if (fid == ZPCI_MAX_FID) {
break;
}
fid++;
}
error_setg(errp, "no free fid could be found"); error_setg(errp, "no free fid could be found");
return 0; return 0;