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slightly reduce idiocy in drivers/staging/bcm/Misc.c 

a) vfs_llseek() does *not* access userland pointers of any kind
b) neither does filp_close(), for that matter
c) ... nor filp_open()
d) vfs_read() does, but we do have a wrapper for that (kernel_read()),
so there's no need to reinvent it.
e) passing current->files to filp_close() on something that never
had been in descriptor table is pointless.

ISAGN: voodoo dolls to be used on voodoo programmers...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-07-22 21:02:01 +04:00
parent e4fad8e5d2
commit 32aecdd365
1 changed files with 5 additions and 26 deletions
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31
drivers/staging/bcm/Misc.c
View File

@ -157,12 +157,7 @@ static int create_worker_threads(PMINI_ADAPTER psAdapter)
static struct file *open_firmware_file(PMINI_ADAPTER Adapter, const char *path)
{
struct file *flp = NULL;
mm_segment_t oldfs;
oldfs = get_fs();
set_fs(get_ds());
flp = filp_open(path, O_RDONLY, S_IRWXU);
set_fs(oldfs);
struct file *flp = filp_open(path, O_RDONLY, S_IRWXU);
if (IS_ERR(flp)) {
pr_err(DRV_NAME "Unable To Open File %s, err %ld", path, PTR_ERR(flp));
flp = NULL;
@ -183,14 +178,12 @@ static int BcmFileDownload(PMINI_ADAPTER Adapter, const char *path, unsigned int
{
int errorno = 0;
struct file *flp = NULL;
mm_segment_t oldfs;
struct timeval tv = {0};
flp = open_firmware_file(Adapter, path);
if (!flp) {
errorno = -ENOENT;
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "Unable to Open %s\n", path);
goto exit_download;
return -ENOENT;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "Opened file is = %s and length =0x%lx to be downloaded at =0x%x", path, (unsigned long)flp->f_dentry->d_inode->i_size, loc);
do_gettimeofday(&tv);
@ -201,10 +194,7 @@ static int BcmFileDownload(PMINI_ADAPTER Adapter, const char *path, unsigned int
errorno = -EIO;
goto exit_download;
}
oldfs = get_fs();
set_fs(get_ds());
vfs_llseek(flp, 0, 0);
set_fs(oldfs);
if (Adapter->bcm_file_readback_from_chip(Adapter->pvInterfaceAdapter, flp, loc)) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "Failed to read back firmware!");
errorno = -EIO;
@ -212,12 +202,7 @@ static int BcmFileDownload(PMINI_ADAPTER Adapter, const char *path, unsigned int
}
exit_download:
oldfs = get_fs();
set_fs(get_ds());
if (flp && !(IS_ERR(flp)))
filp_close(flp, current->files);
set_fs(oldfs);
filp_close(flp, NULL);
return errorno;
}
@ -1080,10 +1065,8 @@ int InitCardAndDownloadFirmware(PMINI_ADAPTER ps_adapter)
static int bcm_parse_target_params(PMINI_ADAPTER Adapter)
{
struct file *flp = NULL;
mm_segment_t oldfs = {0};
char *buff;
int len = 0;
loff_t pos = 0;
buff = kmalloc(BUFFER_1K, GFP_KERNEL);
if (!buff)
@ -1103,20 +1086,16 @@ static int bcm_parse_target_params(PMINI_ADAPTER Adapter)
Adapter->pstargetparams = NULL;
return -ENOENT;
}
oldfs = get_fs();
set_fs(get_ds());
len = vfs_read(flp, (void __user __force *)buff, BUFFER_1K, &pos);
set_fs(oldfs);
len = kernel_read(flp, 0, buff, BUFFER_1K);
filp_close(flp, NULL);
if (len != sizeof(STARGETPARAMS)) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_INITEXIT, MP_INIT, DBG_LVL_ALL, "Mismatch in Target Param Structure!\n");
kfree(buff);
kfree(Adapter->pstargetparams);
Adapter->pstargetparams = NULL;
filp_close(flp, current->files);
return -ENOENT;
}
filp_close(flp, current->files);
/* Check for autolink in config params */
/*