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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:33 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:33 +0200
commitaa7687738af3332470e02ac1060f6c046d83c9a3 (patch)
tree2eb2cd89de0b8dcad12534e28a9178d0325ae491 /drivers/ide/ide.c
parent9232c14bff36d65de254f34386c00b732c5b6099 (diff)
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ide: add ide_setting_ioctl() helper
* Add struct ide_ioctl_devset representing ioctl device setting. * Add ide_setting_ioctl() helper for matching given ioctl and its parameters against table of ioctl device settings. * Convert ide_setting_ioctl() and idedisk_ioctl() to use ide_setting_ioctl(). * Un-export ide_setting_mtx. While at it: * {get,set}_lba_addressing() -> {get,set}_addressing() There should be no functional changes caused by this patch. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide.c')
-rw-r--r--drivers/ide/ide.c53
1 files changed, 34 insertions, 19 deletions
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index f78e789..4910924 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -250,8 +250,6 @@ void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
DEFINE_MUTEX(ide_setting_mtx);
-EXPORT_SYMBOL_GPL(ide_setting_mtx);
-
/**
* ide_spin_wait_hwgroup - wait for group
* @drive: drive in the group
@@ -558,23 +556,23 @@ static int ide_set_nice_ioctl(ide_drive_t *drive, unsigned long arg)
return 0;
}
+static const struct ide_ioctl_devset ide_ioctl_settings[] = {
+{ HDIO_GET_32BIT, HDIO_SET_32BIT, get_io_32bit, set_io_32bit },
+{ HDIO_GET_KEEPSETTINGS, HDIO_SET_KEEPSETTINGS, get_ksettings, set_ksettings },
+{ HDIO_GET_UNMASKINTR, HDIO_SET_UNMASKINTR, get_unmaskirq, set_unmaskirq },
+{ HDIO_GET_DMA, HDIO_SET_DMA, get_using_dma, set_using_dma },
+{ -1, HDIO_SET_PIO_MODE, NULL, set_pio_mode },
+{ 0 }
+};
+
int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device *bdev,
unsigned int cmd, unsigned long arg)
{
- unsigned long flags;
- int err = 0, (*getfunc)(ide_drive_t *), (*setfunc)(ide_drive_t *, int);
+ int err;
- switch (cmd) {
- case HDIO_GET_32BIT: getfunc = get_io_32bit; goto read_val;
- case HDIO_GET_KEEPSETTINGS: getfunc = get_ksettings; goto read_val;
- case HDIO_GET_UNMASKINTR: getfunc = get_unmaskirq; goto read_val;
- case HDIO_GET_DMA: getfunc = get_using_dma; goto read_val;
- case HDIO_SET_32BIT: setfunc = set_io_32bit; goto set_val;
- case HDIO_SET_KEEPSETTINGS: setfunc = set_ksettings; goto set_val;
- case HDIO_SET_PIO_MODE: setfunc = set_pio_mode; goto set_val;
- case HDIO_SET_UNMASKINTR: setfunc = set_unmaskirq; goto set_val;
- case HDIO_SET_DMA: setfunc = set_using_dma; goto set_val;
- }
+ err = ide_setting_ioctl(drive, bdev, cmd, arg, ide_ioctl_settings);
+ if (err != -EOPNOTSUPP)
+ return err;
switch (cmd) {
case HDIO_OBSOLETE_IDENTITY:
@@ -629,11 +627,29 @@ int generic_ide_ioctl(ide_drive_t *drive, struct file *file, struct block_device
default:
return -EINVAL;
}
+}
+EXPORT_SYMBOL(generic_ide_ioctl);
+
+int ide_setting_ioctl(ide_drive_t *drive, struct block_device *bdev,
+ unsigned int cmd, unsigned long arg,
+ const struct ide_ioctl_devset *s)
+{
+ unsigned long flags;
+ int err = -EOPNOTSUPP;
+
+ for (; s->get_ioctl; s++) {
+ if (s->get && s->get_ioctl == cmd)
+ goto read_val;
+ else if (s->set && s->set_ioctl == cmd)
+ goto set_val;
+ }
+
+ return err;
read_val:
mutex_lock(&ide_setting_mtx);
spin_lock_irqsave(&ide_lock, flags);
- err = getfunc(drive);
+ err = s->get(drive);
spin_unlock_irqrestore(&ide_lock, flags);
mutex_unlock(&ide_setting_mtx);
return err >= 0 ? put_user(err, (long __user *)arg) : err;
@@ -646,14 +662,13 @@ set_val:
err = -EACCES;
else {
mutex_lock(&ide_setting_mtx);
- err = setfunc(drive, arg);
+ err = s->set(drive, arg);
mutex_unlock(&ide_setting_mtx);
}
}
return err;
}
-
-EXPORT_SYMBOL(generic_ide_ioctl);
+EXPORT_SYMBOL_GPL(ide_setting_ioctl);
/**
* ide_device_get - get an additional reference to a ide_drive_t