* [PATCH 2/2] platform: make platform_get_irq_byname_optional() optional
[not found] <20220110195449.12448-1-s.shtylyov@omp.ru>
@ 2022-01-10 19:54 ` Sergey Shtylyov
0 siblings, 0 replies; only message in thread
From: Sergey Shtylyov @ 2022-01-10 19:54 UTC (permalink / raw)
To: Greg Kroah-Hartman, Rafael J. Wysocki, linux-kernel
Cc: Andy Shevchenko, Qiang Yu, David Airlie, Daniel Vetter,
Jassi Brar, Thierry Reding, Jonathan Hunter, Wolfgang Grandegger,
Marc Kleine-Budde, David S. Miller, Jakub Kicinski,
Florian Fainelli, Andrew Lunn, Vivien Didelot, Vladimir Oltean,
Joakim Zhang, Giuseppe Cavallaro, Alexandre Torgue, Jose Abreu,
Maxime Coquelin, Jingoo Han, Gustavo Pimentel, Lorenzo Pieralisi,
Rob Herring, Krzysztof Wilczyński, Bjorn Helgaas,
Kamal Dasu, bcm-kernel-feedback-list, Mark Brown, Peter Chen,
Pawel Laszczak, Roger Quadros, Aswath Govindraju, Mathias Nyman,
Chunfeng Yun, Matthias Brugger, dri-devel, lima, linux-tegra,
linux-can, netdev, linux-stm32, linux-arm-kernel, linux-pci,
linux-spi, linux-usb, linux-mediatek
Currently platform_get_irq_byname_optional() returns an error code even
if IRQ resource simply has not been found. It prevents the callers from
being error code agnostic in their error handling:
ret = platform_get_irq_byname_optional(...);
if (ret < 0 && ret != -ENXIO)
return ret; // respect deferred probe
if (ret > 0)
...we get an IRQ...
All other *_optional() APIs seem to return 0 or NULL in case an optional
resource is not available. Let's follow this good example, so that the
callers would look like:
ret = platform_get_irq_byname_optional(...);
if (ret < 0)
return ret;
if (ret > 0)
...we get an IRQ...
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
---
drivers/base/platform.c | 13 ++++++++++---
drivers/gpu/drm/lima/lima_device.c | 2 +-
drivers/mailbox/tegra-hsp.c | 4 ++--
drivers/net/can/rcar/rcar_canfd.c | 4 ++--
drivers/net/dsa/b53/b53_srab.c | 2 +-
drivers/net/ethernet/freescale/fec_main.c | 2 +-
drivers/net/ethernet/freescale/fec_ptp.c | 2 +-
drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c | 4 ++--
.../net/ethernet/stmicro/stmmac/stmmac_platform.c | 4 ++--
drivers/pci/controller/dwc/pcie-designware-host.c | 2 +-
drivers/spi/spi-bcm-qspi.c | 2 +-
drivers/spi/spi-rspi.c | 8 ++++----
drivers/usb/cdns3/cdns3-plat.c | 5 +----
drivers/usb/host/xhci-mtk.c | 2 +-
drivers/usb/mtu3/mtu3_core.c | 2 +-
15 files changed, 31 insertions(+), 27 deletions(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 7c7b3638f02d..1d0ea635922b 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -495,14 +495,21 @@ EXPORT_SYMBOL_GPL(platform_get_irq_byname);
* @name: IRQ name
*
* Get an optional IRQ by name like platform_get_irq_byname(). Except that it
- * does not print an error message if an IRQ can not be obtained.
+ * does not print an error message if an IRQ can not be obtained and returns
+ * 0 when IRQ resource has not been found.
*
- * Return: non-zero IRQ number on success, negative error number on failure.
+ * Return: non-zero IRQ number on success, 0 if IRQ wasn't found, negative error
+ * number on failure.
*/
int platform_get_irq_byname_optional(struct platform_device *dev,
const char *name)
{
- return __platform_get_irq_byname(dev, name);
+ int ret;
+
+ ret = __platform_get_irq_byname(dev, name);
+ if (ret == -ENXIO)
+ return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(platform_get_irq_byname_optional);
diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index 65fdca366e41..e3659aa687c2 100644
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -223,7 +223,7 @@ static int lima_init_ip(struct lima_device *dev, int index)
if (irq_name) {
err = must ? platform_get_irq_byname(pdev, irq_name) :
platform_get_irq_byname_optional(pdev, irq_name);
- if (err < 0)
+ if (err <= 0)
goto out;
ip->irq = err;
}
diff --git a/drivers/mailbox/tegra-hsp.c b/drivers/mailbox/tegra-hsp.c
index acd0675da681..17aa88e31445 100644
--- a/drivers/mailbox/tegra-hsp.c
+++ b/drivers/mailbox/tegra-hsp.c
@@ -667,7 +667,7 @@ static int tegra_hsp_probe(struct platform_device *pdev)
hsp->num_si = (value >> HSP_nSI_SHIFT) & HSP_nINT_MASK;
err = platform_get_irq_byname_optional(pdev, "doorbell");
- if (err >= 0)
+ if (err > 0)
hsp->doorbell_irq = err;
if (hsp->num_si > 0) {
@@ -687,7 +687,7 @@ static int tegra_hsp_probe(struct platform_device *pdev)
return -ENOMEM;
err = platform_get_irq_byname_optional(pdev, name);
- if (err >= 0) {
+ if (err > 0) {
hsp->shared_irqs[i] = err;
count++;
}
diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index ff9d0f5ae0dd..1d4794493c6a 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -1778,7 +1778,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
if (chip_id == RENESAS_RCAR_GEN3) {
ch_irq = platform_get_irq_byname_optional(pdev, "ch_int");
- if (ch_irq < 0) {
+ if (ch_irq <= 0) {
/* For backward compatibility get irq by index */
ch_irq = platform_get_irq(pdev, 0);
if (ch_irq < 0)
@@ -1786,7 +1786,7 @@ static int rcar_canfd_probe(struct platform_device *pdev)
}
g_irq = platform_get_irq_byname_optional(pdev, "g_int");
- if (g_irq < 0) {
+ if (g_irq <= 0) {
/* For backward compatibility get irq by index */
g_irq = platform_get_irq(pdev, 1);
if (g_irq < 0)
diff --git a/drivers/net/dsa/b53/b53_srab.c b/drivers/net/dsa/b53/b53_srab.c
index 4591bb1c05d2..80b7c8f053ad 100644
--- a/drivers/net/dsa/b53/b53_srab.c
+++ b/drivers/net/dsa/b53/b53_srab.c
@@ -420,7 +420,7 @@ static int b53_srab_irq_enable(struct b53_device *dev, int port)
/* Interrupt is optional and was not specified, do not make
* this fatal
*/
- if (p->irq == -ENXIO)
+ if (!p->irq)
return ret;
ret = request_threaded_irq(p->irq, b53_srab_port_isr,
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index bc418b910999..fba36d09a6e0 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -3933,7 +3933,7 @@ fec_probe(struct platform_device *pdev)
for (i = 0; i < irq_cnt; i++) {
snprintf(irq_name, sizeof(irq_name), "int%d", i);
irq = platform_get_irq_byname_optional(pdev, irq_name);
- if (irq < 0)
+ if (irq <= 0)
irq = platform_get_irq(pdev, i);
if (irq < 0) {
ret = irq;
diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c
index 158676eda48d..251863c2d5a4 100644
--- a/drivers/net/ethernet/freescale/fec_ptp.c
+++ b/drivers/net/ethernet/freescale/fec_ptp.c
@@ -615,7 +615,7 @@ void fec_ptp_init(struct platform_device *pdev, int irq_idx)
INIT_DELAYED_WORK(&fep->time_keep, fec_time_keep);
irq = platform_get_irq_byname_optional(pdev, "pps");
- if (irq < 0)
+ if (irq <= 0)
irq = platform_get_irq_optional(pdev, irq_idx);
/* Failure to get an irq is not fatal,
* only the PTP_CLOCK_PPS clock events should stop
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
index 2b38a499a404..5519b5b35365 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-stm32.c
@@ -342,7 +342,7 @@ static int stm32mp1_parse_data(struct stm32_dwmac *dwmac,
if (dwmac->irq_pwr_wakeup == -EPROBE_DEFER)
return -EPROBE_DEFER;
- if (!dwmac->clk_eth_ck && dwmac->irq_pwr_wakeup >= 0) {
+ if (!dwmac->clk_eth_ck && dwmac->irq_pwr_wakeup > 0) {
err = device_init_wakeup(&pdev->dev, true);
if (err) {
dev_err(&pdev->dev, "Failed to init wake up irq\n");
@@ -426,7 +426,7 @@ static int stm32_dwmac_remove(struct platform_device *pdev)
stm32_dwmac_clk_disable(priv->plat->bsp_priv);
- if (dwmac->irq_pwr_wakeup >= 0) {
+ if (dwmac->irq_pwr_wakeup > 0) {
dev_pm_clear_wake_irq(&pdev->dev);
device_init_wakeup(&pdev->dev, false);
}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 232ac98943cd..dcfc04f7bfd4 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -679,7 +679,7 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
*/
stmmac_res->wol_irq =
platform_get_irq_byname_optional(pdev, "eth_wake_irq");
- if (stmmac_res->wol_irq < 0) {
+ if (stmmac_res->wol_irq <= 0) {
if (stmmac_res->wol_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n");
@@ -688,7 +688,7 @@ int stmmac_get_platform_resources(struct platform_device *pdev,
stmmac_res->lpi_irq =
platform_get_irq_byname_optional(pdev, "eth_lpi");
- if (stmmac_res->lpi_irq < 0) {
+ if (stmmac_res->lpi_irq <= 0) {
if (stmmac_res->lpi_irq == -EPROBE_DEFER)
return -EPROBE_DEFER;
dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index f4755f3a03be..00e1a33fd06d 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -364,7 +364,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
} else if (pp->has_msi_ctrl) {
if (!pp->msi_irq) {
pp->msi_irq = platform_get_irq_byname_optional(pdev, "msi");
- if (pp->msi_irq < 0) {
+ if (pp->msi_irq <= 0) {
pp->msi_irq = platform_get_irq(pdev, 0);
if (pp->msi_irq < 0)
return pp->msi_irq;
diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c
index f3de3305d0f5..40ca101e9875 100644
--- a/drivers/spi/spi-bcm-qspi.c
+++ b/drivers/spi/spi-bcm-qspi.c
@@ -1595,7 +1595,7 @@ int bcm_qspi_probe(struct platform_device *pdev,
irq = platform_get_irq(pdev, 0);
}
- if (irq >= 0) {
+ if (irq > 0) {
ret = devm_request_irq(&pdev->dev, irq,
qspi_irq_tab[val].irq_handler, 0,
name,
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 41761f0d892a..b736b57f5ff2 100644
--- a/drivers/spi/spi-rspi.c
+++ b/drivers/spi/spi-rspi.c
@@ -1330,16 +1330,16 @@ static int rspi_probe(struct platform_device *pdev)
ctlr->max_native_cs = rspi->ops->num_hw_ss;
ret = platform_get_irq_byname_optional(pdev, "rx");
- if (ret < 0) {
+ if (ret <= 0) {
ret = platform_get_irq_byname_optional(pdev, "mux");
- if (ret < 0)
+ if (ret <= 0)
ret = platform_get_irq(pdev, 0);
- if (ret >= 0)
+ if (ret > 0)
rspi->rx_irq = rspi->tx_irq = ret;
} else {
rspi->rx_irq = ret;
ret = platform_get_irq_byname(pdev, "tx");
- if (ret >= 0)
+ if (ret > 0)
rspi->tx_irq = ret;
}
diff --git a/drivers/usb/cdns3/cdns3-plat.c b/drivers/usb/cdns3/cdns3-plat.c
index 4d0f027e5bd3..7379b6026f9f 100644
--- a/drivers/usb/cdns3/cdns3-plat.c
+++ b/drivers/usb/cdns3/cdns3-plat.c
@@ -108,10 +108,7 @@ static int cdns3_plat_probe(struct platform_device *pdev)
cdns->wakeup_irq = platform_get_irq_byname_optional(pdev, "wakeup");
if (cdns->wakeup_irq == -EPROBE_DEFER)
return cdns->wakeup_irq;
- else if (cdns->wakeup_irq == 0)
- return -EINVAL;
-
- if (cdns->wakeup_irq < 0) {
+ if (cdns->wakeup_irq <= 0) {
dev_dbg(dev, "couldn't get wakeup irq\n");
cdns->wakeup_irq = 0x0;
}
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 58a0eae4f41b..e3071e7cb165 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -495,7 +495,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
return ret;
irq = platform_get_irq_byname_optional(pdev, "host");
- if (irq < 0) {
+ if (irq <= 0) {
if (irq == -EPROBE_DEFER)
return irq;
diff --git a/drivers/usb/mtu3/mtu3_core.c b/drivers/usb/mtu3/mtu3_core.c
index c4a2c37abf62..08173c05a1d6 100644
--- a/drivers/usb/mtu3/mtu3_core.c
+++ b/drivers/usb/mtu3/mtu3_core.c
@@ -925,7 +925,7 @@ int ssusb_gadget_init(struct ssusb_mtk *ssusb)
return -ENOMEM;
mtu->irq = platform_get_irq_byname_optional(pdev, "device");
- if (mtu->irq < 0) {
+ if (mtu->irq <= 0) {
if (mtu->irq == -EPROBE_DEFER)
return mtu->irq;
--
2.26.3
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2022-01-10 19:54 ` [PATCH 2/2] platform: make platform_get_irq_byname_optional() optional Sergey Shtylyov
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