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ide: convert to ->proc_fops

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->read_proc, ->write_proc are going away, ->proc_fops should be used instead.

The only tricky place is IDENTIFY handling: if for some reason
taskfile_lib_get_identify() fails, buffer _is_ changed and at least
first byte is overwritten. Emulate old behaviour with returning
that first byte to userspace and reporting length=1 despite overall -E.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexey Dobriyan
2009-09-01 17:52:57 -07:00
committed by David S. Miller
parent 76fbebfbb5
commit 6d703a81ad
6 changed files with 372 additions and 214 deletions
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24
include/linux/ide.h
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@@ -919,8 +919,7 @@ __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
typedef struct {
const char *name;
mode_t mode;
read_proc_t *read_proc;
write_proc_t *write_proc;
const struct file_operations *proc_fops;
} ide_proc_entry_t;
void proc_ide_create(void);
@@ -932,24 +931,8 @@ void ide_proc_unregister_port(ide_hwif_t *);
void ide_proc_register_driver(ide_drive_t *, struct ide_driver *);
void ide_proc_unregister_driver(ide_drive_t *, struct ide_driver *);
read_proc_t proc_ide_read_capacity;
read_proc_t proc_ide_read_geometry;
/*
* Standard exit stuff:
*/
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
{ \
len -= off; \
if (len < count) { \
*eof = 1; \
if (len <= 0) \
return 0; \
} else \
len = count; \
*start = page + off; \
return len; \
}
extern const struct file_operations ide_capacity_proc_fops;
extern const struct file_operations ide_geometry_proc_fops;
#else
static inline void proc_ide_create(void) { ; }
static inline void proc_ide_destroy(void) { ; }
@@ -961,7 +944,6 @@ static inline void ide_proc_register_driver(ide_drive_t *drive,
struct ide_driver *driver) { ; }
static inline void ide_proc_unregister_driver(ide_drive_t *drive,
struct ide_driver *driver) { ; }
#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
#endif
enum {