thunderbolt: Rename shadowed variables bit to interrupt_bit and auto_clear_bit

commit 58cdfe6f58b35f17f56386f5fcf937168a423ad1 upstream.

cppcheck reports
drivers/thunderbolt/nhi.c:74:7: style: Local variable 'bit' shadows outer variable [shadowVariable]
  int bit;
      ^
drivers/thunderbolt/nhi.c:66:6: note: Shadowed declaration
 int bit = ring_interrupt_index(ring) & 31;
     ^
drivers/thunderbolt/nhi.c:74:7: note: Shadow variable
  int bit;
      ^
For readablity rename the outer to interrupt_bit and the innner
to auto_clear_bit.

Fixes: 468c49f44759 ("thunderbolt: Disable interrupt auto clear for ring")
Cc: stable@vger.kernel.org
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/thunderbolt/nhi.c b/drivers/thunderbolt/nhi.c
index 318d20b..cfebec1 100644 (file)
--- a/drivers/thunderbolt/nhi.c
+++ b/drivers/thunderbolt/nhi.c
@@ -63,15 +63,15 @@ static void ring_interrupt_active(struct tb_ring *ring, bool active)
 {
        int reg = REG_RING_INTERRUPT_BASE +
                  ring_interrupt_index(ring) / 32 * 4;
-       int bit = ring_interrupt_index(ring) & 31;
-       int mask = 1 << bit;
+       int interrupt_bit = ring_interrupt_index(ring) & 31;
+       int mask = 1 << interrupt_bit;
        u32 old, new;
 
        if (ring->irq > 0) {
                u32 step, shift, ivr, misc;
                void __iomem *ivr_base;
+               int auto_clear_bit;
                int index;
-               int bit;
 
                if (ring->is_tx)
                        index = ring->hop;
@@ -91,11 +91,12 @@ static void ring_interrupt_active(struct tb_ring *ring, bool active)
                 */
                misc = ioread32(ring->nhi->iobase + REG_DMA_MISC);
                if (ring->nhi->quirks & QUIRK_AUTO_CLEAR_INT)
-                       bit = REG_DMA_MISC_INT_AUTO_CLEAR;
+                       auto_clear_bit = REG_DMA_MISC_INT_AUTO_CLEAR;
                else
-                       bit = REG_DMA_MISC_DISABLE_AUTO_CLEAR;
-               if (!(misc & bit))
-                       iowrite32(misc | bit, ring->nhi->iobase + REG_DMA_MISC);
+                       auto_clear_bit = REG_DMA_MISC_DISABLE_AUTO_CLEAR;
+               if (!(misc & auto_clear_bit))
+                       iowrite32(misc | auto_clear_bit,
+                                 ring->nhi->iobase + REG_DMA_MISC);
 
                ivr_base = ring->nhi->iobase + REG_INT_VEC_ALLOC_BASE;
                step = index / REG_INT_VEC_ALLOC_REGS * REG_INT_VEC_ALLOC_BITS;
@@ -115,7 +116,7 @@ static void ring_interrupt_active(struct tb_ring *ring, bool active)
 
        dev_dbg(&ring->nhi->pdev->dev,
                "%s interrupt at register %#x bit %d (%#x -> %#x)\n",
-               active ? "enabling" : "disabling", reg, bit, old, new);
+               active ? "enabling" : "disabling", reg, interrupt_bit, old, new);
 
        if (new == old)
                dev_WARN(&ring->nhi->pdev->dev,