diff options
| author | Ethan Nelson-Moore <enelsonmoore@gmail.com> | 2026-02-02 17:39:09 -0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-02-03 19:42:15 -0800 |
| commit | 9a9424c756feee9ee6e717405a9d6fa7bacdef08 (patch) | |
| tree | f296a25b7c5750e0f6571e85b6e5531519de1756 | |
| parent | 61e94cbdf8220915c033ec5f07977a2de1b1d790 (diff) | |
| download | next-queue-main.tar.gz | |
Several registers referenced in this driver's source code do not
actually exist (they are not writable and read as zero in my testing).
They exist in this driver because it originated as a copy of the dm9601
driver. Notably, these include the multicast filter registers - this
causes the driver to not support multicast packets correctly. Remove
the multicast filter code and register definitions. Instead, set the
chip to receive all multicast filter packets when any multicast
addresses are in the list.
Reviewed-by: Simon Horman <horms@kernel.org> (from v1)
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Link: https://patch.msgid.link/20260203013924.28582-1-enelsonmoore@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/usb/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/net/usb/sr9700.c | 25 | ||||
| -rw-r--r-- | drivers/net/usb/sr9700.h | 7 |
3 files changed, 5 insertions, 28 deletions
diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig index d050adfe860a6d..52a5c0922c79fc 100644 --- a/drivers/net/usb/Kconfig +++ b/drivers/net/usb/Kconfig @@ -319,7 +319,6 @@ config USB_NET_DM9601 config USB_NET_SR9700 tristate "CoreChip-sz SR9700 based USB 1.1 10/100 ethernet devices" depends on USB_USBNET - select CRC32 help This option adds support for CoreChip-sz SR9700 based USB 1.1 10/100 Ethernet adapters. diff --git a/drivers/net/usb/sr9700.c b/drivers/net/usb/sr9700.c index 49764bcf09124b..937e6fef3ac6d2 100644 --- a/drivers/net/usb/sr9700.c +++ b/drivers/net/usb/sr9700.c @@ -17,7 +17,6 @@ #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/usb.h> -#include <linux/crc32.h> #include <linux/usb/usbnet.h> #include "sr9700.h" @@ -231,31 +230,15 @@ static const struct ethtool_ops sr9700_ethtool_ops = { static void sr9700_set_multicast(struct net_device *netdev) { struct usbnet *dev = netdev_priv(netdev); - /* We use the 20 byte dev->data for our 8 byte filter buffer - * to avoid allocating memory that is tricky to free later - */ - u8 *hashes = (u8 *)&dev->data; /* rx_ctl setting : enable, disable_long, disable_crc */ u8 rx_ctl = RCR_RXEN | RCR_DIS_CRC | RCR_DIS_LONG; - memset(hashes, 0x00, SR_MCAST_SIZE); - /* broadcast address */ - hashes[SR_MCAST_SIZE - 1] |= SR_MCAST_ADDR_FLAG; - if (netdev->flags & IFF_PROMISC) { + if (netdev->flags & IFF_PROMISC) rx_ctl |= RCR_PRMSC; - } else if (netdev->flags & IFF_ALLMULTI || - netdev_mc_count(netdev) > SR_MCAST_MAX) { - rx_ctl |= RCR_RUNT; - } else if (!netdev_mc_empty(netdev)) { - struct netdev_hw_addr *ha; - - netdev_for_each_mc_addr(ha, netdev) { - u32 crc = ether_crc(ETH_ALEN, ha->addr) >> 26; - hashes[crc >> 3] |= 1 << (crc & 0x7); - } - } + else if (netdev->flags & IFF_ALLMULTI || !netdev_mc_empty(netdev)) + /* The chip has no multicast filter */ + rx_ctl |= RCR_ALL; - sr_write_async(dev, SR_MAR, SR_MCAST_SIZE, hashes); sr_write_reg_async(dev, SR_RCR, rx_ctl); } diff --git a/drivers/net/usb/sr9700.h b/drivers/net/usb/sr9700.h index 5c04ea0306c779..d1663cb1e8cdb5 100644 --- a/drivers/net/usb/sr9700.h +++ b/drivers/net/usb/sr9700.h @@ -101,9 +101,7 @@ #define WCR_LINKEN (1 << 5) /* Physical Address Reg */ #define SR_PAR 0x10 /* 0x10 ~ 0x15 6 bytes for PAR */ -/* Multicast Address Reg */ -#define SR_MAR 0x16 /* 0x16 ~ 0x1D 8 bytes for MAR */ -/* 0x1e unused */ +/* 0x16 --> 0x1E unused */ /* Phy Reset Reg */ #define SR_PRR 0x1F #define PRR_PHY_RST (1 << 0) @@ -158,9 +156,6 @@ /* parameters */ #define SR_EEPROM_TIMEOUT 1000 #define SR_EEPROM_LEN 256 -#define SR_MCAST_SIZE 8 -#define SR_MCAST_ADDR_FLAG 0x80 -#define SR_MCAST_MAX 64 #define SR_TX_OVERHEAD 2 /* 2bytes header */ #define SR_RX_OVERHEAD 7 /* 3bytes header + 4crc tail */ |