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[v2,16/27] compat_ioctl: bsg: add handler

Message ID 20191217221708.3730997-17-arnd@arndb.de (mailing list archive)
State New, archived
Headers show
Series [v2,01/27] pktcdvd: fix regression on 64-bit architectures | expand

Commit Message

Arnd Bergmann Dec. 17, 2019, 10:16 p.m. UTC
bsg_ioctl() calls into scsi_cmd_ioctl() for a couple of generic commands
and relies on fs/compat_ioctl.c to handle it correctly in compat mode.

Adding a private compat_ioctl() handler avoids that round-trip and lets
us get rid of the generic emulation once this is done.

Note that bsg implements an SG_IO command that is different from the
other drivers and does not need emulation.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 block/bsg.c | 1 +
 1 file changed, 1 insertion(+)
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diff --git a/block/bsg.c b/block/bsg.c
index 833c44b3d458..d7bae94b64d9 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -382,6 +382,7 @@  static const struct file_operations bsg_fops = {
 	.open		=	bsg_open,
 	.release	=	bsg_release,
 	.unlocked_ioctl	=	bsg_ioctl,
+	.compat_ioctl	=	compat_ptr_ioctl,
 	.owner		=	THIS_MODULE,
 	.llseek		=	default_llseek,