diff options
| author | Marek Behún <kabel@kernel.org> | 2021-10-05 21:09:47 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-01 11:04:44 +0300 |
| commit | c37f8369fa0387d5edd708467b3a99aa06127fa6 (patch) | |
| tree | 3a14ea9658d24974618f4ee79e44cbf0f6aded49 /drivers/pci/controller | |
| parent | a0a7875c0305fe103381ad919a85aaf2cc553a7d (diff) | |
| download | linux-c37f8369fa0387d5edd708467b3a99aa06127fa6.tar.xz | |
PCI: aardvark: Deduplicate code in advk_pcie_rd_conf()
commit 67cb2a4c93499c2c22704998fd1fd2bc35194d8e upstream.
Avoid code repetition in advk_pcie_rd_conf() by handling errors with
goto jump, as is customary in kernel.
Link: https://lore.kernel.org/r/20211005180952.6812-9-kabel@kernel.org
Fixes: 43f5c77bcbd2 ("PCI: aardvark: Fix reporting CRS value")
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/pci/controller')
| -rw-r--r-- | drivers/pci/controller/pci-aardvark.c | 48 |
1 files changed, 20 insertions, 28 deletions
diff --git a/drivers/pci/controller/pci-aardvark.c b/drivers/pci/controller/pci-aardvark.c index b051d127f0af..6eea7d5aac26 100644 --- a/drivers/pci/controller/pci-aardvark.c +++ b/drivers/pci/controller/pci-aardvark.c @@ -1090,18 +1090,8 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, (le16_to_cpu(pcie->bridge.pcie_conf.rootctl) & PCI_EXP_RTCTL_CRSSVE); - if (advk_pcie_pio_is_running(pcie)) { - /* - * If it is possible return Completion Retry Status so caller - * tries to issue the request again instead of failing. - */ - if (allow_crs) { - *val = CFG_RD_CRS_VAL; - return PCIBIOS_SUCCESSFUL; - } - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (advk_pcie_pio_is_running(pcie)) + goto try_crs; /* Program the control register */ reg = advk_readl(pcie, PIO_CTRL); @@ -1125,25 +1115,13 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, advk_writel(pcie, 1, PIO_START); ret = advk_pcie_wait_pio(pcie); - if (ret < 0) { - /* - * If it is possible return Completion Retry Status so caller - * tries to issue the request again instead of failing. - */ - if (allow_crs) { - *val = CFG_RD_CRS_VAL; - return PCIBIOS_SUCCESSFUL; - } - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (ret < 0) + goto try_crs; /* Check PIO status and get the read result */ ret = advk_pcie_check_pio_status(pcie, allow_crs, val); - if (ret < 0) { - *val = 0xffffffff; - return PCIBIOS_SET_FAILED; - } + if (ret < 0) + goto fail; if (size == 1) *val = (*val >> (8 * (where & 3))) & 0xff; @@ -1151,6 +1129,20 @@ static int advk_pcie_rd_conf(struct pci_bus *bus, u32 devfn, *val = (*val >> (8 * (where & 3))) & 0xffff; return PCIBIOS_SUCCESSFUL; + +try_crs: + /* + * If it is possible, return Completion Retry Status so that caller + * tries to issue the request again instead of failing. + */ + if (allow_crs) { + *val = CFG_RD_CRS_VAL; + return PCIBIOS_SUCCESSFUL; + } + +fail: + *val = 0xffffffff; + return PCIBIOS_SET_FAILED; } static int advk_pcie_wr_conf(struct pci_bus *bus, u32 devfn, |