diff options
| author | Peter Huewe <peterhuewe@gmx.de> | 2013-02-19 13:07:28 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-11 09:15:32 -0700 |
| commit | eb1bd49c50880df667905b4cfb472064f62c05d1 (patch) | |
| tree | bbac4621c3d1c03046feefb0ab065ef6404e63dc | |
| parent | c37aeab62514cd623afa1b952ca86d53dd21a745 (diff) | |
staging/sep: Check pointers before dereferencing (fix smatch warning)
smatch complains about two dereferenced before check issues:
sep_main.c:2898 sep_free_dma_tables_and_dcb() warn: variable dereferenced before check
'dma_ctx' (see line 2885)
sep_main.c:2898 sep_free_dma_tables_and_dcb() warn: variable dereferenced before check
'*dma_ctx' (see line 2885)
-> Move the checks to the top, but keep the semantics.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/staging/sep/sep_main.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/staging/sep/sep_main.c b/drivers/staging/sep/sep_main.c index 366d56b9a255..f5b73419eebc 100644 --- a/drivers/staging/sep/sep_main.c +++ b/drivers/staging/sep/sep_main.c @@ -2880,6 +2880,8 @@ static int sep_free_dma_tables_and_dcb(struct sep_device *sep, bool isapplet, dev_dbg(&sep->pdev->dev, "[PID%d] sep_free_dma_tables_and_dcb\n", current->pid); + if (!dma_ctx || !*dma_ctx) /* nothing to be done here*/ + return 0; if (((*dma_ctx)->secure_dma == false) && (isapplet == true)) { dev_dbg(&sep->pdev->dev, "[PID%d] handling applet\n", @@ -2895,8 +2897,7 @@ static int sep_free_dma_tables_and_dcb(struct sep_device *sep, bool isapplet, * Go over each DCB and see if * tail pointer must be updated */ - for (i = 0; dma_ctx && *dma_ctx && - i < (*dma_ctx)->nr_dcb_creat; i++, dcb_table_ptr++) { + for (i = 0; i < (*dma_ctx)->nr_dcb_creat; i++, dcb_table_ptr++) { if (dcb_table_ptr->out_vr_tail_pt) { pt_hold = (unsigned long)dcb_table_ptr-> out_vr_tail_pt; |