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Commit f063429a authored by Dan Carpenter's avatar Dan Carpenter Committed by Greg Kroah-Hartman
Browse files

PCI: cadence: Fix find_first_zero_bit() limit 

[ Upstream commit 0aa3a0937feeb91a0e4e438c3c063b749b194192 ]

The ep->ob_region_map bitmap is a long and it has BITS_PER_LONG bits.

Link: https://lore.kernel.org/r/20220315065829.GA13572@kili


Fixes: 37dddf14 ("PCI: cadence: Add EndPoint Controller driver for Cadence PCIe controller")
Signed-off-by: default avatarDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: default avatarLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 5543752a

drivers/pci/controller/pcie-cadence-ep.c

+1 −2
Original line number Diff line number Diff line
@@ -178,8 +178,7 @@ static int cdns_pcie_ep_map_addr(struct pci_epc *epc, u8 fn, phys_addr_t addr, 
	struct cdns_pcie *pcie = &ep->pcie;

	u32 r;



	r = find_first_zero_bit(&ep->ob_region_map,

				sizeof(ep->ob_region_map) * BITS_PER_LONG);

	r = find_first_zero_bit(&ep->ob_region_map, BITS_PER_LONG);

	if (r >= ep->max_regions - 1) {

		dev_err(&epc->dev, "no free outbound region\n");

		return -EINVAL;