From: Thomas Renninger Date: Thu, 29 Jul 2010 20:08:44 +0000 (+0200) Subject: acpi ec: Fix possible double io port registration X-Git-Tag: v5.15~28797^2~14 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=de4f10466e9347a2f1bfe39e501539557bed2c4b;p=mirror_ubuntu-kernels.git acpi ec: Fix possible double io port registration which will result in a harmless but ugly WARN message on some machines. Signed-off-by: Thomas Renninger CC: mjg59@srcf.ucam.org CC: platform-driver-x86@vger.kernel.org CC: linux-acpi@vger.kernel.org CC: astarikovskiy@suse.de CC: akpm@linux-foundation.org Signed-off-by: Matthew Garrett --- diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 265a99c1eb14..1fa0aafebe2a 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -818,6 +818,12 @@ static int acpi_ec_add(struct acpi_device *device) if (!first_ec) first_ec = ec; device->driver_data = ec; + + WARN(!request_region(ec->data_addr, 1, "EC data"), + "Could not request EC data io port 0x%lx", ec->data_addr); + WARN(!request_region(ec->command_addr, 1, "EC cmd"), + "Could not request EC cmd io port 0x%lx", ec->command_addr); + pr_info(PREFIX "GPE = 0x%lx, I/O: command/status = 0x%lx, data = 0x%lx\n", ec->gpe, ec->command_addr, ec->data_addr); @@ -844,6 +850,8 @@ static int acpi_ec_remove(struct acpi_device *device, int type) kfree(handler); } mutex_unlock(&ec->lock); + release_region(ec->data_addr, 1); + release_region(ec->command_addr, 1); device->driver_data = NULL; if (ec == first_ec) first_ec = NULL; @@ -864,18 +872,10 @@ ec_parse_io_ports(struct acpi_resource *resource, void *context) * the second address region returned is the status/command * port. */ - if (ec->data_addr == 0) { + if (ec->data_addr == 0) ec->data_addr = resource->data.io.minimum; - WARN(!request_region(ec->data_addr, 1, "EC data"), - "Could not request EC data io port %lu", - ec->data_addr); - } - else if (ec->command_addr == 0) { + else if (ec->command_addr == 0) ec->command_addr = resource->data.io.minimum; - WARN(!request_region(ec->command_addr, 1, "EC command"), - "Could not request EC command io port %lu", - ec->command_addr); - } else return AE_CTRL_TERMINATE;