| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 030/530] PCI: xgene: Fix cfg resource mapping | Date | Wed, 12 May 2021 16:42:20 +0200 |
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From: Dejin Zheng <zhengdejin5@gmail.com>
commit d4707d79fae08c8996a1ba45965a491045a22dda upstream.
In commit e2dcd20b1645 a change was made to use devm_platform_ioremap_resource_byname() to simplify code and remove the res variable; this was wrong since the res variable is still needed and as an outcome the port->cfg_addr gets an erroneous address.
Revert the change going back to original behaviour.
Link: https://lore.kernel.org/r/20210328144118.305074-1-zhengdejin5@gmail.com Fixes: e2dcd20b1645a ("PCI: controller: Convert to devm_platform_ioremap_resource_byname()") Reported-by: dann.frazier@canonical.com Tested-by: dann frazier <dann.frazier@canonical.com> Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: stable@vger.kernel.org # v5.9+ Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/pci/controller/pci-xgene.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/pci/controller/pci-xgene.c +++ b/drivers/pci/controller/pci-xgene.c @@ -355,7 +355,8 @@ static int xgene_pcie_map_reg(struct xge if (IS_ERR(port->csr_base)) return PTR_ERR(port->csr_base); - port->cfg_base = devm_platform_ioremap_resource_byname(pdev, "cfg"); + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg"); + port->cfg_base = devm_ioremap_resource(dev, res); if (IS_ERR(port->cfg_base)) return PTR_ERR(port->cfg_base); port->cfg_addr = res->start;
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