Author: Julia Lawall <julia@diku.dk> romfs_iget returns an ERR_PTR value in an error case instead of NULL. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @match exists@ expression x, E; statement S1, S2; @@ x = romfs_iget(…) … when != x = E ( * if (x == …
Category: Linux
Sep 24 2009
edac: fix resource size calculation
Author: Julia Lawall <julia@diku.dk> Use the function resource_size, which reduces the chance of introducing off-by-one errors in calculating the resource size. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // @@ struct resource *res; @@ – (res->end – res->start) + 1 + resource_size(res) // Signed-off-by: Julia Lawall Signed-off-by: Doug Thompson Signed-off-by: Andrew …
Sep 23 2009
drivers/video: add kmalloc NULL tests
Author: Julia Lawall <julia@diku.dk> Check that the result of kmalloc is not NULL before passing it to other functions. The semantic match that finds this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @@ expression *x; identifier f; constant char *C; @@ x = \(kmalloc\|kcalloc\|kzalloc\)(…); … when != x == NULL when != x != NULL when …
Sep 23 2009
drivers/rtc: introduce missing kfree
Author: Julia Lawall <julia@diku.dk> Error handling code following a kzalloc should free the allocated data. The semantic match that finds the problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // @r exists@ local idexpression x; statement S; expression E; identifier f,f1,l; position p1,p2; expression *ptr != NULL; @@ x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(…); … if (x == NULL) S f1 …
Sep 23 2009
drivers/rtc: correct error-handling code
Author: Julia Lawall <julia@diku.dk> This code is not executed before ds1307->rtc has been successfully initialized to the result of calling rtc_device_register. Thus the test that ds1307->rtc is not NULL is always true. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @match exists@ expression x, E; statement S1, …
Sep 22 2009
drivers/net/wireless: Use usb_endpoint_dir_out
Author: Julia Lawall <julia@diku.dk> Use the usb_endpoint_dir_out API function. Note that the use of USB_TYPE_MASK in the original code is incorrect; it results in a test that is always false. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // @@ struct usb_endpoint_descriptor *endpoint; expression E; @@ – (endpoint->bEndpointAddress & E) == USB_DIR_OUT …
Sep 21 2009
MIPS: SMTC: Remove duplicate structure field initialization
Author: Julia Lawall <julia@diku.dk> The definition of the irq_ipi structure has two initializations of the flags field. This combines them. [Ralf: The issue was originally introduced by commit be4894196d79455f420dd7bb78be7dc73bec115c (linux-mips.org) rsp. 033890b084adfa367c544864451d7730552ce8bf (kernel.org). The original intention of the code was to initialize .flags with both flags ored together. The broken C code as actually implemented …
Sep 19 2009
Staging: slicoss: remove duplicate structure field initialization
Author: Julia Lawall <julia@diku.dk> The definition of slic_netdev_ops has initializations of a local function and eth_mac_addr for its ndo_set_mac_address field. This change uses only the local function. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @r@ identifier I, s, fld; position p0,p; expression E; @@ struct I s =@p0 { … …
Sep 19 2009
V4L/DVB (13166): remove duplicate structure field initialization
Author: Julia Lawall <julia@diku.dk> The definition of tvaudio_tuner_ops initializes the s_tuner field twice. It appears that the second case should initialize the g_tuner field. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @r@ identifier I, s, fld; position p0,p; expression E; @@ struct I s =@p0 { … .fld@p = E, …
Sep 19 2009
drivers/net: remove duplicate structure field initialization
Author: Julia Lawall <julia@diku.dk> The definitions of vnet_ops and ehea_netdev_ops have initializations of a local function and eth_change_mtu for their respective ndo_change_mtu fields. This change uses only the local function. The semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @r@ identifier I, s, fld; position p0,p; expression E; @@ struct I s …