From 24e4a1211f691fc671de44685430dbad757d8487 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 13 Apr 2010 11:22:01 +0200 Subject: ALSA: info - Use standard types for info callbacks Use loff_t, size_t and ssize_t for arguments of info callbacks to follow the standard procfs. Signed-off-by: Takashi Iwai --- sound/drivers/opl4/opl4_proc.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/opl4/opl4_proc.c b/sound/drivers/opl4/opl4_proc.c index 1679300b7583..eb72814dfd5f 100644 --- a/sound/drivers/opl4/opl4_proc.c +++ b/sound/drivers/opl4/opl4_proc.c @@ -49,9 +49,10 @@ static int snd_opl4_mem_proc_release(struct snd_info_entry *entry, return 0; } -static long snd_opl4_mem_proc_read(struct snd_info_entry *entry, void *file_private_data, - struct file *file, char __user *_buf, - unsigned long count, unsigned long pos) +static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry, + void *file_private_data, + struct file *file, char __user *_buf, + size_t count, loff_t pos) { struct snd_opl4 *opl4 = entry->private_data; long size; @@ -75,9 +76,11 @@ static long snd_opl4_mem_proc_read(struct snd_info_entry *entry, void *file_priv return 0; } -static long snd_opl4_mem_proc_write(struct snd_info_entry *entry, void *file_private_data, - struct file *file, const char __user *_buf, - unsigned long count, unsigned long pos) +static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, + void *file_private_data, + struct file *file, + const char __user *_buf, + size_t count, size_t pos) { struct snd_opl4 *opl4 = entry->private_data; long size; @@ -101,8 +104,10 @@ static long snd_opl4_mem_proc_write(struct snd_info_entry *entry, void *file_pri return 0; } -static long long snd_opl4_mem_proc_llseek(struct snd_info_entry *entry, void *file_private_data, - struct file *file, long long offset, int orig) +static loff_t snd_opl4_mem_proc_llseek(struct snd_info_entry *entry, + void *file_private_data, + struct file *file, + loff_t offset, int orig) { switch (orig) { case SEEK_SET: -- cgit v1.2.3 From d97e1b78239c7e7e441088e0b644bd3b076002e6 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 13 Apr 2010 11:33:54 +0200 Subject: ALSA: info - Check file position validity in common layer Check the validity of the file position in the common info layer before calling read or write callbacks in assumption that entry->size is set up properly to indicate the max file size. Removed the redundant checks from the callbacks as well. Signed-off-by: Takashi Iwai --- sound/drivers/opl4/opl4_proc.c | 46 +++++++++++++++--------------------------- 1 file changed, 16 insertions(+), 30 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/opl4/opl4_proc.c b/sound/drivers/opl4/opl4_proc.c index eb72814dfd5f..210b89de06d7 100644 --- a/sound/drivers/opl4/opl4_proc.c +++ b/sound/drivers/opl4/opl4_proc.c @@ -55,25 +55,18 @@ static ssize_t snd_opl4_mem_proc_read(struct snd_info_entry *entry, size_t count, loff_t pos) { struct snd_opl4 *opl4 = entry->private_data; - long size; char* buf; - size = count; - if (pos + size > entry->size) - size = entry->size - pos; - if (size > 0) { - buf = vmalloc(size); - if (!buf) - return -ENOMEM; - snd_opl4_read_memory(opl4, buf, pos, size); - if (copy_to_user(_buf, buf, size)) { - vfree(buf); - return -EFAULT; - } + buf = vmalloc(count); + if (!buf) + return -ENOMEM; + snd_opl4_read_memory(opl4, buf, pos, count); + if (copy_to_user(_buf, buf, count)) { vfree(buf); - return size; + return -EFAULT; } - return 0; + vfree(buf); + return count; } static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, @@ -83,25 +76,18 @@ static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, size_t count, size_t pos) { struct snd_opl4 *opl4 = entry->private_data; - long size; char *buf; - size = count; - if (pos + size > entry->size) - size = entry->size - pos; - if (size > 0) { - buf = vmalloc(size); - if (!buf) - return -ENOMEM; - if (copy_from_user(buf, _buf, size)) { - vfree(buf); - return -EFAULT; - } - snd_opl4_write_memory(opl4, buf, pos, size); + buf = vmalloc(count); + if (!buf) + return -ENOMEM; + if (copy_from_user(buf, _buf, count)) { vfree(buf); - return size; + return -EFAULT; } - return 0; + snd_opl4_write_memory(opl4, buf, pos, count); + vfree(buf); + return count; } static loff_t snd_opl4_mem_proc_llseek(struct snd_info_entry *entry, -- cgit v1.2.3 From 73029e0ff18dfac8a1aab1dc188e1e150bbe3adc Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 13 Apr 2010 11:39:47 +0200 Subject: ALSA: info - Implement common llseek for binary mode The llseek implementation is identical for existing driver implementations, so let's merge to the common layer. The same code for the text proc file can be used even for the binary proc file. The driver can provide its own llseek method if needed. Then the common code will be skipped. Signed-off-by: Takashi Iwai --- sound/drivers/opl4/opl4_proc.c | 24 ------------------------ 1 file changed, 24 deletions(-) (limited to 'sound/drivers') diff --git a/sound/drivers/opl4/opl4_proc.c b/sound/drivers/opl4/opl4_proc.c index 210b89de06d7..c5c13c4c260e 100644 --- a/sound/drivers/opl4/opl4_proc.c +++ b/sound/drivers/opl4/opl4_proc.c @@ -90,35 +90,11 @@ static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, return count; } -static loff_t snd_opl4_mem_proc_llseek(struct snd_info_entry *entry, - void *file_private_data, - struct file *file, - loff_t offset, int orig) -{ - switch (orig) { - case SEEK_SET: - file->f_pos = offset; - break; - case SEEK_CUR: - file->f_pos += offset; - break; - case SEEK_END: /* offset is negative */ - file->f_pos = entry->size + offset; - break; - default: - return -EINVAL; - } - if (file->f_pos > entry->size) - file->f_pos = entry->size; - return file->f_pos; -} - static struct snd_info_entry_ops snd_opl4_mem_proc_ops = { .open = snd_opl4_mem_proc_open, .release = snd_opl4_mem_proc_release, .read = snd_opl4_mem_proc_read, .write = snd_opl4_mem_proc_write, - .llseek = snd_opl4_mem_proc_llseek, }; int snd_opl4_create_proc(struct snd_opl4 *opl4) -- cgit v1.2.3 From 670ff6abd6caff406b217f8a828d6c03656535d8 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 10 May 2010 10:21:32 +0200 Subject: ALSA: opl4 - Fix a wrong argument in proc write callback The commit 24e4a1211f691fc671de44685430dbad757d8487 ALSA: info - Use standard types for info callbacks introduced a wrong type to snd_opl4_mem_proc_write() for pos argument. Fixed now. Signed-off-by: Takashi Iwai --- sound/drivers/opl4/opl4_proc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/drivers') diff --git a/sound/drivers/opl4/opl4_proc.c b/sound/drivers/opl4/opl4_proc.c index c5c13c4c260e..df850b8830a5 100644 --- a/sound/drivers/opl4/opl4_proc.c +++ b/sound/drivers/opl4/opl4_proc.c @@ -73,7 +73,7 @@ static ssize_t snd_opl4_mem_proc_write(struct snd_info_entry *entry, void *file_private_data, struct file *file, const char __user *_buf, - size_t count, size_t pos) + size_t count, loff_t pos) { struct snd_opl4 *opl4 = entry->private_data; char *buf; -- cgit v1.2.3