Patch "net: hns3: fix the imp capability bit cannot exceed 32 bits issue" has been added to the 6.1-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    net: hns3: fix the imp capability bit cannot exceed 32 bits issue

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-hns3-fix-the-imp-capability-bit-cannot-exceed-32.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 50bd516cdaa38904e26138878e71b88d0ecdd90b
Author: Hao Lan <lanhao@xxxxxxxxxx>
Date:   Thu Jul 20 10:05:07 2023 +0800

    net: hns3: fix the imp capability bit cannot exceed 32 bits issue
    
    [ Upstream commit b27d0232e8897f7c896dc8ad80c9907dd57fd3f3 ]
    
    Current only the first 32 bits of the capability flag bit are considered.
    When the matching capability flag bit is greater than 31 bits,
    it will get an error bit.This patch use bitmap to solve this issue.
    It can handle each capability bit whitout bit width limit.
    
    Fixes: da77aef9cc58 ("net: hns3: create common cmdq resource allocate/free/query APIs")
    Signed-off-by: Hao Lan <lanhao@xxxxxxxxxx>
    Signed-off-by: Jijie Shao <shaojijie@xxxxxxxxxx>
    Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hnae3.h b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
index 17137de9338cf..fcb8b6dc5ab92 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hnae3.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hnae3.h
@@ -31,6 +31,7 @@
 #include <linux/pci.h>
 #include <linux/pkt_sched.h>
 #include <linux/types.h>
+#include <linux/bitmap.h>
 #include <net/pkt_cls.h>
 
 #define HNAE3_MOD_VERSION "1.0"
@@ -402,7 +403,7 @@ struct hnae3_ae_dev {
 	unsigned long hw_err_reset_req;
 	struct hnae3_dev_specs dev_specs;
 	u32 dev_version;
-	unsigned long caps[BITS_TO_LONGS(HNAE3_DEV_CAPS_MAX_NUM)];
+	DECLARE_BITMAP(caps, HNAE3_DEV_CAPS_MAX_NUM);
 	void *priv;
 };
 
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_cmd.c b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_cmd.c
index c797d54f98caa..2ccb0f5460797 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_cmd.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_common/hclge_comm_cmd.c
@@ -170,6 +170,20 @@ static const struct hclge_comm_caps_bit_map hclge_vf_cmd_caps[] = {
 	{HCLGE_COMM_CAP_GRO_B, HNAE3_DEV_SUPPORT_GRO_B},
 };
 
+static void
+hclge_comm_capability_to_bitmap(unsigned long *bitmap, __le32 *caps)
+{
+	const unsigned int words = HCLGE_COMM_QUERY_CAP_LENGTH;
+	u32 val[HCLGE_COMM_QUERY_CAP_LENGTH];
+	unsigned int i;
+
+	for (i = 0; i < words; i++)
+		val[i] = __le32_to_cpu(caps[i]);
+
+	bitmap_from_arr32(bitmap, val,
+			  HCLGE_COMM_QUERY_CAP_LENGTH * BITS_PER_TYPE(u32));
+}
+
 static void
 hclge_comm_parse_capability(struct hnae3_ae_dev *ae_dev, bool is_pf,
 			    struct hclge_comm_query_version_cmd *cmd)
@@ -178,11 +192,12 @@ hclge_comm_parse_capability(struct hnae3_ae_dev *ae_dev, bool is_pf,
 				is_pf ? hclge_pf_cmd_caps : hclge_vf_cmd_caps;
 	u32 size = is_pf ? ARRAY_SIZE(hclge_pf_cmd_caps) :
 				ARRAY_SIZE(hclge_vf_cmd_caps);
-	u32 caps, i;
+	DECLARE_BITMAP(caps, HCLGE_COMM_QUERY_CAP_LENGTH * BITS_PER_TYPE(u32));
+	u32 i;
 
-	caps = __le32_to_cpu(cmd->caps[0]);
+	hclge_comm_capability_to_bitmap(caps, cmd->caps);
 	for (i = 0; i < size; i++)
-		if (hnae3_get_bit(caps, caps_map[i].imp_bit))
+		if (test_bit(caps_map[i].imp_bit, caps))
 			set_bit(caps_map[i].local_bit, ae_dev->caps);
 }