On Monday 20 April 2009, Amit Kucheria wrote:
> Whitespace-fixed version and passed through checkpatch.pl
>
> Check for return values of i2c read/write operations and size of scripts being
> uploaded to TWL4030
>
> Signed-off-by: Amit Kucheria <amit.kuche...@verdurent.com>
> ---
> drivers/mfd/twl4030-core.c | 2 +-
> drivers/mfd/twl4030-power.c | 49 ++++++++++++++++++++++++++++++------------
The changes look OK ... but what this needs is to be
split into two patches. The -core one should go to
mainline; it's trivial, comment-only, unrelated to the
$SUBJECT patch. The -power one seems OK for merge to
the OMAP tree.
(Of course, the -power driver should probably go mainline
at some point. Once it stops breaking warm-reset!)
> 2 files changed, 36 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
> index 769b34b..067b02e 100644
> --- a/drivers/mfd/twl4030-core.c
> +++ b/drivers/mfd/twl4030-core.c
> @@ -358,7 +358,7 @@ EXPORT_SYMBOL(twl4030_i2c_read);
> int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
> {
>
> - /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
> + /* 2 bytes: offset 1 contains the data, offset 0 is used by i2c_write */
> u8 temp_buffer[2] = { 0 };
> /* offset 1 contains the data */
> temp_buffer[1] = value;
> diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
> index 9dc493b..b4b636d 100644
> --- a/drivers/mfd/twl4030-power.c
> +++ b/drivers/mfd/twl4030-power.c
> @@ -257,36 +257,38 @@ static int __init config_warmreset_sequence(u8 address)
> return err;
> }
>
> -void twl4030_configure_resource(struct twl4030_resconfig *rconfig)
> +static int __init twl4030_configure_resource(struct twl4030_resconfig
> *rconfig)
> {
> int rconfig_addr;
> + int err;
> u8 type;
>
> if (rconfig->resource > NUM_OF_RESOURCES) {
> printk(KERN_ERR
> "TWL4030 Resource %d does not exist\n",
> rconfig->resource);
> - return;
> + return -EINVAL;
> }
>
> rconfig_addr = res_config_addrs[rconfig->resource];
>
> /* Set resource group */
> -
> if (rconfig->devgroup >= 0)
> - twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> + err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> rconfig->devgroup << 5,
> rconfig_addr + DEVGROUP_OFFSET);
> + if (err < 0) {
> + printk(KERN_ERR "TWL4030 failed to program devgroup");
> + return err;
> + }
>
> /* Set resource types */
> -
> - if (twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER,
> - &type,
> - rconfig_addr + TYPE_OFFSET) < 0) {
> - printk(KERN_ERR
> - "TWL4030 Resource %d type could not read\n",
> + err = twl4030_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
> + rconfig_addr + TYPE_OFFSET);
> + if (err < 0) {
> + printk(KERN_ERR "TWL4030 Resource %d type could not be read\n",
> rconfig->resource);
> - return;
> + return err;
> }
>
> if (rconfig->type >= 0) {
> @@ -299,8 +301,14 @@ void twl4030_configure_resource(struct twl4030_resconfig
> *rconfig)
> type |= rconfig->type2 << 3;
> }
>
> - twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> + err = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
> type, rconfig_addr + TYPE_OFFSET);
> + if (err < 0) {
> + printk(KERN_ERR "TWL4030 failed to program resource type");
> + return err;
> + }
> +
> + return 0;
>
> }
>
> @@ -309,6 +317,12 @@ static int __init load_triton_script(struct
> twl4030_script *tscript)
> u8 address = triton_next_free_address;
> int err;
>
> + /* Make sure the script isn't going beyond last valid address */
> + if ((address + tscript->size) > (END_OF_SCRIPT-1)) {
> + printk(KERN_ERR "TWL4030 script too big error\n");
> + return -EINVAL;
> + }
> +
> err = twl4030_write_script(address, tscript->script, tscript->size);
> if (err)
> return err;
> @@ -346,15 +360,22 @@ void __init twl4030_power_init(struct
> twl4030_power_data *triton2_scripts)
>
> for (i = 0; i < triton2_scripts->size; i++) {
> err = load_triton_script(triton2_scripts->scripts[i]);
> - if (err)
> + if (err < 0) {
> + printk(KERN_ERR "TWL4030 failed to load scripts");
> break;
> + }
> }
>
> resconfig = triton2_scripts->resource_config;
> if (resconfig) {
> while (resconfig->resource) {
> - twl4030_configure_resource(resconfig);
> + err = twl4030_configure_resource(resconfig);
> resconfig++;
> + if (err < 0) {
> + printk(KERN_ERR
> + "TWL4030 failed to configure resource");
> + break;
> + }
> }
> }
>
> --
> 1.6.0.4
>
> --
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