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101 lines
2.9 KiB
Diff
101 lines
2.9 KiB
Diff
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From 0ad840e46732e95df274a84b042dcb210be9f946 Mon Sep 17 00:00:00 2001
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From: Roy Pledge <roy.pledge@nxp.com>
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Date: Thu, 28 Mar 2019 09:56:35 -0400
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Subject: [PATCH] sdk_qbman: Avoid variable length array in USDPAA
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As of Linux 5.0 variable length arrays on the stack are no
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longer allowed. Change to a dynamic array and create a common
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exit point in the function for cleanup.
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Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
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---
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drivers/staging/fsl_qbman/fsl_usdpaa.c | 36 +++++++++++++++++-----------------
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1 file changed, 18 insertions(+), 18 deletions(-)
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--- a/drivers/staging/fsl_qbman/fsl_usdpaa.c
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+++ b/drivers/staging/fsl_qbman/fsl_usdpaa.c
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@@ -559,6 +559,7 @@ static bool check_portal_channel(void *c
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static int usdpaa_release(struct inode *inode, struct file *filp)
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{
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+ int err = 0;
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struct ctx *ctx = filp->private_data;
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struct mem_mapping *map, *tmpmap;
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struct portal_mapping *portal, *tmpportal;
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@@ -569,9 +570,14 @@ static int usdpaa_release(struct inode *
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struct qm_portal_config *qm_alloced_portal = NULL;
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struct bm_portal_config *bm_alloced_portal = NULL;
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- struct qm_portal *portal_array[qman_portal_max];
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+ struct qm_portal **portal_array;
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int portal_count = 0;
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+ portal_array = kmalloc_array(qman_portal_max,
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+ sizeof(struct qm_portal *), GFP_KERNEL);
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+ if (!portal_array)
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+ return -ENOMEM;
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+
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/* Ensure the release operation cannot be migrated to another
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CPU as CPU specific variables may be needed during cleanup */
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#ifdef CONFIG_PREEMPT_RT_FULL
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@@ -612,18 +618,14 @@ static int usdpaa_release(struct inode *
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qm_alloced_portal = qm_get_unused_portal();
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if (!qm_alloced_portal) {
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pr_crit("No QMan portal avalaible for cleanup\n");
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-#ifdef CONFIG_PREEMPT_RT_FULL
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- migrate_enable();
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-#endif
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- return -1;
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+ err = -1;
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+ goto done;
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}
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qm_cleanup_portal = kmalloc(sizeof(struct qm_portal),
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GFP_KERNEL);
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if (!qm_cleanup_portal) {
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-#ifdef CONFIG_PREEMPT_RT_FULL
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- migrate_enable();
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-#endif
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- return -ENOMEM;
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+ err = -ENOMEM;
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+ goto done;
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}
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init_qm_portal(qm_alloced_portal, qm_cleanup_portal);
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portal_array[portal_count] = qm_cleanup_portal;
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@@ -633,18 +635,14 @@ static int usdpaa_release(struct inode *
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bm_alloced_portal = bm_get_unused_portal();
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if (!bm_alloced_portal) {
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pr_crit("No BMan portal avalaible for cleanup\n");
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-#ifdef CONFIG_PREEMPT_RT_FULL
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- migrate_enable();
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-#endif
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- return -1;
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+ err = -1;
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+ goto done;
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}
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bm_cleanup_portal = kmalloc(sizeof(struct bm_portal),
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GFP_KERNEL);
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if (!bm_cleanup_portal) {
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-#ifdef CONFIG_PREEMPT_RT_FULL
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- migrate_enable();
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-#endif
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- return -ENOMEM;
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+ err = -ENOMEM;
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+ goto done;
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}
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init_bm_portal(bm_alloced_portal, bm_cleanup_portal);
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}
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@@ -721,10 +719,12 @@ static int usdpaa_release(struct inode *
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}
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kfree(ctx);
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+done:
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#ifdef CONFIG_PREEMPT_RT_FULL
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migrate_enable();
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#endif
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- return 0;
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+ kfree(portal_array);
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+ return err;
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}
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static int check_mmap_dma(struct ctx *ctx, struct vm_area_struct *vma,
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