linux-kernel - [PATCH V2 05/12] spmi: pmic-arb: fix memory allocation for mapping

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Message-Id: <1501225847-27807-6-git-send-email-kgunda@codeaurora.org>
Date:   Fri, 28 Jul 2017 12:40:40 +0530
From:   Kiran Gunda <kgunda@...eaurora.org>
To:     gregkh@...uxfoundation.org, sboyd@...eaurora.org,
        Kiran Gunda <kgunda@...eaurora.org>,
        Abhijeet Dharmapurikar <adharmap@...eaurora.org>,
        David Collins <collinsd@...eaurora.org>,
        linux-kernel@...r.kernel.org
Cc:     linux-arm-msm@...r.kernel.org, linux-arm-msm-owner@...r.kernel.org
Subject: [PATCH V2 05/12] spmi: pmic-arb: fix memory allocation for mapping_table

Allocate the correct memory size (max_pmic_peripherals) for the
mapping_table that holds the apid to ppid mapping. Also use a local
variable for mapping_table for better alignment of the code.

Fixes: 987a9f128b8a ("spmi: pmic-arb: Support more than 128 peripherals")
Signed-off-by: Kiran Gunda <kgunda@...eaurora.org>
Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
---
 drivers/spmi/spmi-pmic-arb.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index 0577cfd..340e7b8 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c
@@ -929,6 +929,7 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	struct spmi_controller *ctrl;
 	struct resource *res;
 	void __iomem *core;
+	u32 *mapping_table;
 	u32 channel, ee, hw_ver;
 	int err;
 
@@ -1038,16 +1039,14 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
 	}
 
 	pmic_arb->ee = ee;
-
-	pmic_arb->mapping_table = devm_kcalloc(&ctrl->dev,
-					PMIC_ARB_MAX_PERIPHS - 1,
-					sizeof(*pmic_arb->mapping_table),
-					GFP_KERNEL);
-	if (!pmic_arb->mapping_table) {
+	mapping_table = devm_kcalloc(&ctrl->dev, PMIC_ARB_MAX_PERIPHS,
+					sizeof(*mapping_table), GFP_KERNEL);
+	if (!mapping_table) {
 		err = -ENOMEM;
 		goto err_put_ctrl;
 	}
 
+	pmic_arb->mapping_table = mapping_table;
 	/* Initialize max_apid/min_apid to the opposite bounds, during
 	 * the irq domain translation, we are sure to update these */
 	pmic_arb->max_apid = 0;
-- 
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