From: Michał Kępień Date: Fri, 22 Jan 2016 14:27:20 +0000 (+0100) Subject: dell-smbios: return the SMBIOS buffer from dell_smbios_get_buffer() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bc2104c27aad0c988d23c6abcd46f3313618bdbb;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git dell-smbios: return the SMBIOS buffer from dell_smbios_get_buffer() Ultimately, the SMBIOS buffer should not be exported from dell-smbios. Currently, dell-laptop accesses it directly using a global variable, so make dell_smbios_get_buffer() return a pointer to the SMBIOS buffer and replace all uses of the global variable with local variables. Signed-off-by: Michał Kępień Reviewed-by: Pali Rohár Signed-off-by: Darren Hart --- diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index 0bb22114abce..5b200f29c55d 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -409,6 +409,7 @@ static inline int dell_smi_error(int value) static int dell_rfkill_set(void *data, bool blocked) { + struct calling_interface_buffer *buffer; int disable = blocked ? 1 : 0; unsigned long radio = (unsigned long)data; int hwswitch_bit = (unsigned long)data - 1; @@ -416,7 +417,7 @@ static int dell_rfkill_set(void *data, bool blocked) int status; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); dell_smbios_send_request(17, 11); ret = buffer->output[0]; @@ -451,7 +452,8 @@ static int dell_rfkill_set(void *data, bool blocked) /* Must be called with the buffer held */ static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio, - int status) + int status, + struct calling_interface_buffer *buffer) { if (status & BIT(0)) { /* Has hw-switch, sync sw_state to BIOS */ @@ -474,12 +476,13 @@ static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio, static void dell_rfkill_query(struct rfkill *rfkill, void *data) { + struct calling_interface_buffer *buffer; int radio = ((unsigned long)data & 0xF); int hwswitch; int status; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); dell_smbios_send_request(17, 11); ret = buffer->output[0]; @@ -514,12 +517,13 @@ static struct dentry *dell_laptop_dir; static int dell_debugfs_show(struct seq_file *s, void *data) { + struct calling_interface_buffer *buffer; int hwswitch_state; int hwswitch_ret; int status; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); dell_smbios_send_request(17, 11); ret = buffer->output[0]; @@ -613,11 +617,12 @@ static const struct file_operations dell_debugfs_fops = { static void dell_update_rfkill(struct work_struct *ignored) { + struct calling_interface_buffer *buffer; int hwswitch = 0; int status; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); dell_smbios_send_request(17, 11); ret = buffer->output[0]; @@ -637,16 +642,17 @@ static void dell_update_rfkill(struct work_struct *ignored) if (wifi_rfkill) { dell_rfkill_update_hw_state(wifi_rfkill, 1, status, hwswitch); - dell_rfkill_update_sw_state(wifi_rfkill, 1, status); + dell_rfkill_update_sw_state(wifi_rfkill, 1, status, buffer); } if (bluetooth_rfkill) { dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status, hwswitch); - dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status); + dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status, + buffer); } if (wwan_rfkill) { dell_rfkill_update_hw_state(wwan_rfkill, 3, status, hwswitch); - dell_rfkill_update_sw_state(wwan_rfkill, 3, status); + dell_rfkill_update_sw_state(wwan_rfkill, 3, status, buffer); } out: @@ -694,6 +700,7 @@ static struct notifier_block dell_laptop_rbtn_notifier = { static int __init dell_setup_rfkill(void) { + struct calling_interface_buffer *buffer; int status, ret, whitelisted; const char *product; @@ -709,7 +716,7 @@ static int __init dell_setup_rfkill(void) if (!force_rfkill && !whitelisted) return 0; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); dell_smbios_send_request(17, 11); ret = buffer->output[0]; status = buffer->output[1]; @@ -866,6 +873,7 @@ static void dell_cleanup_rfkill(void) static int dell_send_intensity(struct backlight_device *bd) { + struct calling_interface_buffer *buffer; int token; int ret; @@ -873,7 +881,7 @@ static int dell_send_intensity(struct backlight_device *bd) if (token == -1) return -ENODEV; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = token; buffer->input[1] = bd->props.brightness; @@ -890,6 +898,7 @@ static int dell_send_intensity(struct backlight_device *bd) static int dell_get_intensity(struct backlight_device *bd) { + struct calling_interface_buffer *buffer; int token; int ret; @@ -897,7 +906,7 @@ static int dell_get_intensity(struct backlight_device *bd) if (token == -1) return -ENODEV; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = token; if (power_supply_is_system_supplied() > 0) @@ -1154,10 +1163,11 @@ static bool kbd_led_present; static int kbd_get_info(struct kbd_info *info) { + struct calling_interface_buffer *buffer; u8 units; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = 0x0; dell_smbios_send_request(4, 11); @@ -1243,9 +1253,10 @@ static int kbd_set_level(struct kbd_state *state, u8 level) static int kbd_get_state(struct kbd_state *state) { + struct calling_interface_buffer *buffer; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = 0x1; dell_smbios_send_request(4, 11); @@ -1274,9 +1285,10 @@ static int kbd_get_state(struct kbd_state *state) static int kbd_set_state(struct kbd_state *state) { + struct calling_interface_buffer *buffer; int ret; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = 0x2; buffer->input[1] = BIT(state->mode_bit) & 0xFFFF; buffer->input[1] |= (state->triggers & 0xFF) << 16; @@ -1313,6 +1325,7 @@ static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old) static int kbd_set_token_bit(u8 bit) { + struct calling_interface_buffer *buffer; int id; int ret; @@ -1323,7 +1336,7 @@ static int kbd_set_token_bit(u8 bit) if (id == -1) return -EINVAL; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = da_tokens[id].location; buffer->input[1] = da_tokens[id].value; dell_smbios_send_request(1, 0); @@ -1335,6 +1348,7 @@ static int kbd_set_token_bit(u8 bit) static int kbd_get_token_bit(u8 bit) { + struct calling_interface_buffer *buffer; int id; int ret; int val; @@ -1346,7 +1360,7 @@ static int kbd_get_token_bit(u8 bit) if (id == -1) return -EINVAL; - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = da_tokens[id].location; dell_smbios_send_request(0, 0); ret = buffer->output[0]; @@ -1972,6 +1986,7 @@ static void kbd_led_exit(void) static int __init dell_init(void) { + struct calling_interface_buffer *buffer; int max_intensity = 0; int token; int ret; @@ -2017,7 +2032,7 @@ static int __init dell_init(void) token = find_token_location(BRIGHTNESS_TOKEN); if (token != -1) { - dell_smbios_get_buffer(); + buffer = dell_smbios_get_buffer(); buffer->input[0] = token; dell_smbios_send_request(0, 2); if (buffer->output[0] == 0) diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c index 9dacb20b988e..1427899c4f8f 100644 --- a/drivers/platform/x86/dell-smbios.c +++ b/drivers/platform/x86/dell-smbios.c @@ -41,10 +41,11 @@ static int da_num_tokens; struct calling_interface_token *da_tokens; EXPORT_SYMBOL_GPL(da_tokens); -void dell_smbios_get_buffer(void) +struct calling_interface_buffer *dell_smbios_get_buffer(void) { mutex_lock(&buffer_mutex); dell_smbios_clear_buffer(); + return buffer; } EXPORT_SYMBOL_GPL(dell_smbios_get_buffer); diff --git a/drivers/platform/x86/dell-smbios.h b/drivers/platform/x86/dell-smbios.h index 80b5048f2bd2..f7a51f5ddeed 100644 --- a/drivers/platform/x86/dell-smbios.h +++ b/drivers/platform/x86/dell-smbios.h @@ -38,7 +38,7 @@ struct calling_interface_token { extern struct calling_interface_buffer *buffer; extern struct calling_interface_token *da_tokens; -void dell_smbios_get_buffer(void); +struct calling_interface_buffer *dell_smbios_get_buffer(void); void dell_smbios_clear_buffer(void); void dell_smbios_release_buffer(void); void dell_smbios_send_request(int class, int select);