[PATCH net-next 3/3] bnxt_en: resize bnxt_irq name field to fit format string

[Michael Chan <michael.chan@broadcom.com>]

From: Edwin Peer <edwin.peer@broadcom.com>

The name field of struct bnxt_irq is written using snprintf in
bnxt_setup_msix(). Make the field large enough to fit the maximal
formatted string to prevent truncation.  Truncated IRQ names are
less meaningful to the user.  For example, "enp4s0f0np0-TxRx-0"
gets truncated to "enp4s0f0np0-TxRx-" with the existing code.

Make sure we have space for the extra characters added to the IRQ
names:

  - the characters introduced by the static format string: hyphens
  - the maximal static substituted ring type string: "TxRx"
  - the maximum length of an integer formatted as a string, even
    though reasonable ring numbers would never be as long as this.

Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.h b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
index 3b805ed433ed..69231e85140b 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.h
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.h
@@ -1217,12 +1217,15 @@ struct bnxt_napi {
 	bool			in_reset;
 };
 
+/* "TxRx", 2 hypens, plus maximum integer */
+#define BNXT_IRQ_NAME_EXTRA	17
+
 struct bnxt_irq {
 	irq_handler_t	handler;
 	unsigned int	vector;
 	u8		requested:1;
 	u8		have_cpumask:1;
-	char		name[IFNAMSIZ + 2];
+	char		name[IFNAMSIZ + BNXT_IRQ_NAME_EXTRA];
 	cpumask_var_t	cpu_mask;
 };
 
-- 
2.30.1