@@ -564,13 +564,13 @@ static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
reg = ioremap(rsrc_reg.start, resource_size(&rsrc_reg));
if (reg == NULL) {
printk(KERN_ERR "%pOF: Can't map registers !", np);
- goto fail;
+ return;
}
/* Allocate the host controller data structure */
hose = pcibios_alloc_controller(np);
if (!hose)
- goto fail;
+ goto unmap_io;
hose->first_busno = bus_range ? bus_range[0] : 0x0;
hose->last_busno = bus_range ? bus_range[1] : 0xff;
@@ -595,8 +595,10 @@ static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
pci_process_bridge_OF_ranges(hose, np, primary);
/* Parse inbound mapping resources */
- if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window) != 0)
- goto fail;
+ if (ppc4xx_parse_dma_ranges(hose, reg, &dma_window)) {
+ pcibios_free_controller(hose);
+ goto unmap_io;
+ }
/* Configure outbound ranges POMs */
ppc4xx_configure_pcix_POMs(hose, reg);
@@ -605,14 +607,8 @@ static void __init ppc4xx_probe_pcix_bridge(struct device_node *np)
ppc4xx_configure_pcix_PIMs(hose, reg, &dma_window, big_pim, msi);
/* We don't need the registers anymore */
+unmap_io:
iounmap(reg);
- return;
-
- fail:
- if (hose)
- pcibios_free_controller(hose);
- if (reg)
- iounmap(reg);
}
#ifdef CONFIG_PPC4xx_PCI_EXPRESS
Date: Thu, 16 Mar 2023 19:09:33 +0100 The label “fail” was used to jump to another pointer check despite of the detail in the implementation of the function “ppc4xx_probe_pcix_bridge” that it was determined already that the corresponding variable contained a null pointer (because of a failed function call in two cases). 1. Thus return directly after a call of the function “ioremap” failed. 2. Use a more appropriate label instead. 3. Delete two questionable checks. 4. Adjust the exception handling for another if branch a bit more. 5. Remove a return statement at the end. This issue was detected by using the Coccinelle software. Fixes: 5738ec6d00b7abbcd4cd342af83fd18d192b0979 ("[POWERPC] 4xx: PLB to PCI-X support") Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> --- arch/powerpc/platforms/4xx/pci.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) -- 2.39.2