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SubjectRe: [PATCH V1 3/4] net: qrtr: Change port allocation to use cyclic idr
Hi Deepak,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.9-rc2 next-20200828]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Deepak-Kumar-Singh/General-qrtr-fixes/20200830-224348
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1127b219ce9481c84edad9711626d856127d5e51
config: x86_64-randconfig-a014-20200830 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> net/qrtr/qrtr.c:747:43: warning: incompatible pointer to integer conversion passing 'u32 *' (aka 'unsigned int *') to parameter of type 'int' [-Wint-conversion]
rc = idr_alloc_cyclic(&qrtr_ports, ipc, &min_port,
^~~~~~~~~
include/linux/idr.h:117:51: note: passing argument to parameter 'start' here
int idr_alloc_cyclic(struct idr *, void *ptr, int start, int end, gfp_t);
^
net/qrtr/qrtr.c:758:43: warning: incompatible pointer to integer conversion passing 'u32 *' (aka 'unsigned int *') to parameter of type 'int' [-Wint-conversion]
rc = idr_alloc_cyclic(&qrtr_ports, ipc, &min_port,
^~~~~~~~~
include/linux/idr.h:117:51: note: passing argument to parameter 'start' here
int idr_alloc_cyclic(struct idr *, void *ptr, int start, int end, gfp_t);
^
2 warnings generated.

# https://github.com/0day-ci/linux/commit/66a6331807301aa59aa1355f7e21546f88cb0b2d
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Deepak-Kumar-Singh/General-qrtr-fixes/20200830-224348
git checkout 66a6331807301aa59aa1355f7e21546f88cb0b2d
vim +747 net/qrtr/qrtr.c

728
729 /* Assign port number to socket.
730 *
731 * Specify port in the integer pointed to by port, and it will be adjusted
732 * on return as necesssary.
733 *
734 * Port may be:
735 * 0: Assign ephemeral port in [QRTR_MIN_EPH_SOCKET, QRTR_MAX_EPH_SOCKET]
736 * <QRTR_MIN_EPH_SOCKET: Specified; requires CAP_NET_ADMIN
737 * >QRTR_MIN_EPH_SOCKET: Specified; available to all
738 */
739 static int qrtr_port_assign(struct qrtr_sock *ipc, int *port)
740 {
741 u32 min_port;
742 int rc;
743
744 mutex_lock(&qrtr_port_lock);
745 if (!*port) {
746 min_port = QRTR_MIN_EPH_SOCKET;
> 747 rc = idr_alloc_cyclic(&qrtr_ports, ipc, &min_port,
748 QRTR_MAX_EPH_SOCKET, GFP_ATOMIC);
749 if (!rc)
750 *port = min_port;
751 } else if (*port < QRTR_MIN_EPH_SOCKET && !capable(CAP_NET_ADMIN)) {
752 rc = -EACCES;
753 } else if (*port == QRTR_PORT_CTRL) {
754 min_port = 0;
755 rc = idr_alloc_u32(&qrtr_ports, ipc, &min_port, 0, GFP_ATOMIC);
756 } else {
757 min_port = *port;
758 rc = idr_alloc_cyclic(&qrtr_ports, ipc, &min_port,
759 *port, GFP_ATOMIC);
760 if (!rc)
761 *port = min_port;
762 }
763 mutex_unlock(&qrtr_port_lock);
764
765 if (rc == -ENOSPC)
766 return -EADDRINUSE;
767 else if (rc < 0)
768 return rc;
769
770 sock_hold(&ipc->sk);
771
772 return 0;
773 }
774

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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