From: Dan Carpenter <dan.carpenter@oracle.com> To: Tero Kristo <t-kristo@ti.com>, Stephen Boyd <sboyd@kernel.org> Cc: Michael Turquette <mturquette@baylibre.com>, linux-omap@vger.kernel.org, linux-clk@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] clk: ti: Fix error handling in ti_clk_parse_divider_data() Date: Tue, 15 Jan 2019 07:01:49 +0000 [thread overview] Message-ID: <20190115070149.wpiyqw5vqqqsapxt@kili.mountain> (raw) In-Reply-To: <154706313779.15366.12078258980663060364@swboyd.mtv.corp.google.com> The ti_clk_parse_divider_data() function is only called from _get_div_table_from_setup(). That function doesn't look at the return value but instead looks at the "*table" pointer. In this case, if the kcalloc() fails then *table is NULL (which means success). It should instead be an error pointer. The ti_clk_parse_divider_data() function has two callers. One checks for errors and the other doesn't. I have fixed it so now both handle errors. Fixes: 4f6be5655dc9 ("clk: ti: divider: add driver internal API for parsing divider data") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- drivers/clk/ti/divider.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c index 8d77090ad94a..4c48ef424ad5 100644 --- a/drivers/clk/ti/divider.c +++ b/drivers/clk/ti/divider.c @@ -403,8 +403,10 @@ int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div, num_dividers = i; tmp = kcalloc(valid_div + 1, sizeof(*tmp), GFP_KERNEL); - if (!tmp) + if (!tmp) { + *table = PTR_ERR(-ENOMEM); return -ENOMEM; + } valid_div = 0; *width = 0; @@ -439,6 +441,7 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup) { struct clk_omap_divider *div; struct clk_omap_reg *reg; + int ret; if (!setup) return NULL; @@ -458,6 +461,12 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup) div->flags |= CLK_DIVIDER_POWER_OF_TWO; div->table = _get_div_table_from_setup(setup, &div->width); + if (IS_ERR(div->table)) { + ret = PTR_ERR(div->table); + kfree(div); + return ret; + } + div->shift = setup->bit_shift; div->latch = -EINVAL; -- 2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com> To: Tero Kristo <t-kristo@ti.com>, Stephen Boyd <sboyd@kernel.org> Cc: Michael Turquette <mturquette@baylibre.com>, linux-omap@vger.kernel.org, linux-clk@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH] clk: ti: Fix error handling in ti_clk_parse_divider_data() Date: Tue, 15 Jan 2019 10:01:49 +0300 [thread overview] Message-ID: <20190115070149.wpiyqw5vqqqsapxt@kili.mountain> (raw) In-Reply-To: <154706313779.15366.12078258980663060364@swboyd.mtv.corp.google.com> The ti_clk_parse_divider_data() function is only called from _get_div_table_from_setup(). That function doesn't look at the return value but instead looks at the "*table" pointer. In this case, if the kcalloc() fails then *table is NULL (which means success). It should instead be an error pointer. The ti_clk_parse_divider_data() function has two callers. One checks for errors and the other doesn't. I have fixed it so now both handle errors. Fixes: 4f6be5655dc9 ("clk: ti: divider: add driver internal API for parsing divider data") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> --- drivers/clk/ti/divider.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c index 8d77090ad94a..4c48ef424ad5 100644 --- a/drivers/clk/ti/divider.c +++ b/drivers/clk/ti/divider.c @@ -403,8 +403,10 @@ int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div, num_dividers = i; tmp = kcalloc(valid_div + 1, sizeof(*tmp), GFP_KERNEL); - if (!tmp) + if (!tmp) { + *table = PTR_ERR(-ENOMEM); return -ENOMEM; + } valid_div = 0; *width = 0; @@ -439,6 +441,7 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup) { struct clk_omap_divider *div; struct clk_omap_reg *reg; + int ret; if (!setup) return NULL; @@ -458,6 +461,12 @@ struct clk_hw *ti_clk_build_component_div(struct ti_clk_divider *setup) div->flags |= CLK_DIVIDER_POWER_OF_TWO; div->table = _get_div_table_from_setup(setup, &div->width); + if (IS_ERR(div->table)) { + ret = PTR_ERR(div->table); + kfree(div); + return ret; + } + div->shift = setup->bit_shift; div->latch = -EINVAL; -- 2.11.0
next prev parent reply other threads:[~2019-01-15 7:01 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-12-17 14:45 [bug report] clk: ti: divider: add driver internal API for parsing divider data Dan Carpenter 2019-01-09 19:45 ` Stephen Boyd 2019-01-15 7:01 ` Dan Carpenter [this message] 2019-01-15 7:01 ` [PATCH] clk: ti: Fix error handling in ti_clk_parse_divider_data() Dan Carpenter 2019-01-15 8:36 ` Tero Kristo 2019-01-15 8:36 ` Tero Kristo 2019-01-15 13:21 ` kbuild test robot 2019-01-15 13:21 ` kbuild test robot 2019-01-15 13:42 ` Dan Carpenter 2019-01-15 13:42 ` Dan Carpenter 2019-01-15 13:53 ` kbuild test robot 2019-01-15 13:53 ` kbuild test robot 2019-01-15 19:46 ` [PATCH v2] " Dan Carpenter 2019-01-15 19:46 ` Dan Carpenter 2019-01-24 19:24 ` Stephen Boyd 2019-01-24 19:24 ` Stephen Boyd 2019-01-24 19:50 ` Tero Kristo 2019-01-24 19:50 ` Tero Kristo
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20190115070149.wpiyqw5vqqqsapxt@kili.mountain \ --to=dan.carpenter@oracle.com \ --cc=kernel-janitors@vger.kernel.org \ --cc=linux-clk@vger.kernel.org \ --cc=linux-omap@vger.kernel.org \ --cc=mturquette@baylibre.com \ --cc=sboyd@kernel.org \ --cc=t-kristo@ti.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.