[SCSI] compat_ioct: fix bsg SG_IO
bsg's SG_IO doesn't work on 32-bit userspace and 64-bit kernelspace. The problem is that both sg and bsg drivers use SG_IO ioctl. sg_ioctl_trans() does 32/64-bit conversion even against bsg header. It messes up bsg header. bsg driver gets garbage. This patch fixes sg_ioctl_trans to handle only sg header (struct sg_io_hdr). Reported-by: Giridhar Malavali <giridhar.malavali@qlogic.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
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@ -301,6 +301,12 @@ static int sg_ioctl_trans(unsigned int fd, unsigned int cmd,
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u32 data;
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void __user *dxferp;
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int err;
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int interface_id;
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if (get_user(interface_id, &sgio32->interface_id))
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return -EFAULT;
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if (interface_id != 'S')
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return sys_ioctl(fd, cmd, (unsigned long)sgio32);
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if (get_user(iovec_count, &sgio32->iovec_count))
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return -EFAULT;
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