diff options
Diffstat (limited to 'drivers/scsi/megaraid/megaraid_mm.c')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_mm.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/scsi/megaraid/megaraid_mm.c b/drivers/scsi/megaraid/megaraid_mm.c index 41f82f76d88..a70692779a1 100644 --- a/drivers/scsi/megaraid/megaraid_mm.c +++ b/drivers/scsi/megaraid/megaraid_mm.c @@ -16,11 +16,12 @@ */ #include <linux/sched.h> #include <linux/slab.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include "megaraid_mm.h" // Entry points for char node driver +static DEFINE_MUTEX(mraid_mm_mutex); static int mraid_mm_open(struct inode *, struct file *); static long mraid_mm_unlocked_ioctl(struct file *, uint, unsigned long); @@ -75,6 +76,7 @@ static const struct file_operations lsi_fops = { .compat_ioctl = mraid_mm_compat_ioctl, #endif .owner = THIS_MODULE, + .llseek = noop_llseek, }; static struct miscdevice megaraid_mm_dev = { @@ -98,7 +100,6 @@ mraid_mm_open(struct inode *inode, struct file *filep) */ if (!capable(CAP_SYS_ADMIN)) return (-EACCES); - cycle_kernel_lock(); return 0; } @@ -223,10 +224,10 @@ mraid_mm_unlocked_ioctl(struct file *filep, unsigned int cmd, { int err; - /* inconsistant: mraid_mm_compat_ioctl doesn't take the BKL */ - lock_kernel(); + /* inconsistent: mraid_mm_compat_ioctl doesn't take the BKL */ + mutex_lock(&mraid_mm_mutex); err = mraid_mm_ioctl(filep, cmd, arg); - unlock_kernel(); + mutex_unlock(&mraid_mm_mutex); return err; } @@ -485,6 +486,8 @@ mimd_to_kioc(mimd_t __user *umimd, mraid_mmadp_t *adp, uioc_t *kioc) pthru32->dataxferaddr = kioc->buf_paddr; if (kioc->data_dir & UIOC_WR) { + if (pthru32->dataxferlen > kioc->xferlen) + return -EINVAL; if (copy_from_user(kioc->buf_vaddr, kioc->user_data, pthru32->dataxferlen)) { return (-EFAULT); @@ -895,7 +898,7 @@ hinfo_to_cinfo(mraid_hba_info_t *hinfo, mcontroller_t *cinfo) /** * mraid_mm_register_adp - Registration routine for low level drivers - * @lld_adp : Adapter objejct + * @lld_adp : Adapter object */ int mraid_mm_register_adp(mraid_mmadp_t *lld_adp) |