[dpdk-dev] [PATCH v3 2/2] examples/ethtool: get reg width to allocate memory

[zr@semihalf.com]

From: Zyta Szpak <zr@semihalf.com>

Version 2 of fixing the fixed register width assumption.
Not every device uses 32-bit wide register. The app was allocating too
little space for 64-bit registers which resulted in memory corruption.
This commit resolves this by getting the size of register in bytes for
a specific device. If the device does not implement this function, it
fallsback to sizeof(uint32_t)

Signed-off-by: Zyta Szpak <zr@semihalf.com>
---
 examples/ethtool/lib/rte_ethtool.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/examples/ethtool/lib/rte_ethtool.c b/examples/ethtool/lib/rte_ethtool.c
index 42e05f1..59191ca 100644
--- a/examples/ethtool/lib/rte_ethtool.c
+++ b/examples/ethtool/lib/rte_ethtool.c
@@ -88,10 +88,14 @@ int
 rte_ethtool_get_regs_len(uint8_t port_id)
 {
 	int count_regs;
+	int reg_width;
 
 	count_regs = rte_eth_dev_get_reg_length(port_id);
+	reg_width = rte_eth_dev_get_reg_width(port_id);
+	if (reg_width < 0)
+		reg_width = sizeof(uint32_t);
 	if (count_regs > 0)
-		return count_regs * sizeof(uint32_t);
+		return count_regs * reg_width;
 	return count_regs;
 }
 
-- 
1.9.1