3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
commit b184c388f773f30b6c707d3d4599b2db80f4390c upstream.
Create default gpio base if neither device node nor
platform data is defined.
Signed-off-by: Sonic Zhang <sonic.zhang@xxxxxxxxxx>
Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Tested-by: Antonio Fiol <antonio@xxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/gpio-mcp23s08.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
--- a/drivers/gpio/gpio-mcp23s08.c
+++ b/drivers/gpio/gpio-mcp23s08.c
@@ -785,9 +785,11 @@ static int mcp230xx_probe(struct i2c_cli
client->irq = irq_of_parse_and_map(client->dev.of_node, 0);
} else {
pdata = dev_get_platdata(&client->dev);
- if (!pdata || !gpio_is_valid(pdata->base)) {
- dev_dbg(&client->dev, "invalid platform data\n");
- return -EINVAL;
+ if (!pdata) {
+ pdata = devm_kzalloc(&client->dev,
+ sizeof(struct mcp23s08_platform_data),
+ GFP_KERNEL);
+ pdata->base = -1;
}
}
@@ -908,10 +910,11 @@ static int mcp23s08_probe(struct spi_dev
} else {
type = spi_get_device_id(spi)->driver_data;
pdata = dev_get_platdata(&spi->dev);
- if (!pdata || !gpio_is_valid(pdata->base)) {
- dev_dbg(&spi->dev,
- "invalid or missing platform data\n");
- return -EINVAL;
+ if (!pdata) {
+ pdata = devm_kzalloc(&spi->dev,
+ sizeof(struct mcp23s08_platform_data),
+ GFP_KERNEL);
+ pdata->base = -1;
}
for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) {
--
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