From: "Mike Rapoport (Microsoft)" <[email protected]> * use dedicated labels for error handling instead of checking if a pointer is not null to decide if it should be unmapped * drop assignment of values to err that are only used to print a numeric error code, there are pr_warn()s for each failure already so printing a numeric error code in the next line does not add anything useful
Signed-off-by: Mike Rapoport (Microsoft) <[email protected]> --- kernel/liveupdate/kexec_handover.c | 39 +++++++++++++----------------- 1 file changed, 17 insertions(+), 22 deletions(-) diff --git a/kernel/liveupdate/kexec_handover.c b/kernel/liveupdate/kexec_handover.c index d4482b6e3cae..e248ce2e04b7 100644 --- a/kernel/liveupdate/kexec_handover.c +++ b/kernel/liveupdate/kexec_handover.c @@ -1441,46 +1441,40 @@ void __init kho_memory_init(void) void __init kho_populate(phys_addr_t fdt_phys, u64 fdt_len, phys_addr_t scratch_phys, u64 scratch_len) { + unsigned int scratch_cnt = scratch_len / sizeof(*kho_scratch); struct kho_scratch *scratch = NULL; phys_addr_t mem_map_phys; void *fdt = NULL; - int err = 0; - unsigned int scratch_cnt = scratch_len / sizeof(*kho_scratch); + int err; /* Validate the input FDT */ fdt = early_memremap(fdt_phys, fdt_len); if (!fdt) { pr_warn("setup: failed to memremap FDT (0x%llx)\n", fdt_phys); - err = -EFAULT; - goto out; + goto err_report; } err = fdt_check_header(fdt); if (err) { pr_warn("setup: handover FDT (0x%llx) is invalid: %d\n", fdt_phys, err); - err = -EINVAL; - goto out; + goto err_unmap_fdt; } err = fdt_node_check_compatible(fdt, 0, KHO_FDT_COMPATIBLE); if (err) { pr_warn("setup: handover FDT (0x%llx) is incompatible with '%s': %d\n", fdt_phys, KHO_FDT_COMPATIBLE, err); - err = -EINVAL; - goto out; + goto err_unmap_fdt; } mem_map_phys = kho_get_mem_map_phys(fdt); - if (!mem_map_phys) { - err = -ENOENT; - goto out; - } + if (!mem_map_phys) + goto err_unmap_fdt; scratch = early_memremap(scratch_phys, scratch_len); if (!scratch) { pr_warn("setup: failed to memremap scratch (phys=0x%llx, len=%lld)\n", scratch_phys, scratch_len); - err = -EFAULT; - goto out; + goto err_unmap_fdt; } /* @@ -1497,7 +1491,7 @@ void __init kho_populate(phys_addr_t fdt_phys, u64 fdt_len, if (WARN_ON(err)) { pr_warn("failed to mark the scratch region 0x%pa+0x%pa: %pe", &area->addr, &size, ERR_PTR(err)); - goto out; + goto err_unmap_scratch; } pr_debug("Marked 0x%pa+0x%pa as scratch", &area->addr, &size); } @@ -1519,13 +1513,14 @@ void __init kho_populate(phys_addr_t fdt_phys, u64 fdt_len, kho_scratch_cnt = scratch_cnt; pr_info("found kexec handover data.\n"); -out: - if (fdt) - early_memunmap(fdt, fdt_len); - if (scratch) - early_memunmap(scratch, scratch_len); - if (err) - pr_warn("disabling KHO revival: %d\n", err); + return; + +err_unmap_scratch: + early_memunmap(scratch, scratch_len); +err_unmap_fdt: + early_memunmap(fdt, fdt_len); +err_report: + pr_warn("disabling KHO revival\n"); } /* Helper functions for kexec_file_load */ base-commit: 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7 -- 2.51.0
